science of homework

Is Homework Good for Kids? Here’s What the Research Says

A s kids return to school, debate is heating up once again over how they should spend their time after they leave the classroom for the day.

The no-homework policy of a second-grade teacher in Texas went viral last week , earning praise from parents across the country who lament the heavy workload often assigned to young students. Brandy Young told parents she would not formally assign any homework this year, asking students instead to eat dinner with their families, play outside and go to bed early.

But the question of how much work children should be doing outside of school remains controversial, and plenty of parents take issue with no-homework policies, worried their kids are losing a potential academic advantage. Here’s what you need to know:

For decades, the homework standard has been a “10-minute rule,” which recommends a daily maximum of 10 minutes of homework per grade level. Second graders, for example, should do about 20 minutes of homework each night. High school seniors should complete about two hours of homework each night. The National PTA and the National Education Association both support that guideline.

But some schools have begun to give their youngest students a break. A Massachusetts elementary school has announced a no-homework pilot program for the coming school year, lengthening the school day by two hours to provide more in-class instruction. “We really want kids to go home at 4 o’clock, tired. We want their brain to be tired,” Kelly Elementary School Principal Jackie Glasheen said in an interview with a local TV station . “We want them to enjoy their families. We want them to go to soccer practice or football practice, and we want them to go to bed. And that’s it.”

A New York City public elementary school implemented a similar policy last year, eliminating traditional homework assignments in favor of family time. The change was quickly met with outrage from some parents, though it earned support from other education leaders.

New solutions and approaches to homework differ by community, and these local debates are complicated by the fact that even education experts disagree about what’s best for kids.

The research

The most comprehensive research on homework to date comes from a 2006 meta-analysis by Duke University psychology professor Harris Cooper, who found evidence of a positive correlation between homework and student achievement, meaning students who did homework performed better in school. The correlation was stronger for older students—in seventh through 12th grade—than for those in younger grades, for whom there was a weak relationship between homework and performance.

Cooper’s analysis focused on how homework impacts academic achievement—test scores, for example. His report noted that homework is also thought to improve study habits, attitudes toward school, self-discipline, inquisitiveness and independent problem solving skills. On the other hand, some studies he examined showed that homework can cause physical and emotional fatigue, fuel negative attitudes about learning and limit leisure time for children. At the end of his analysis, Cooper recommended further study of such potential effects of homework.

Despite the weak correlation between homework and performance for young children, Cooper argues that a small amount of homework is useful for all students. Second-graders should not be doing two hours of homework each night, he said, but they also shouldn’t be doing no homework.

Not all education experts agree entirely with Cooper’s assessment.

Cathy Vatterott, an education professor at the University of Missouri-St. Louis, supports the “10-minute rule” as a maximum, but she thinks there is not sufficient proof that homework is helpful for students in elementary school.

“Correlation is not causation,” she said. “Does homework cause achievement, or do high achievers do more homework?”

Vatterott, the author of Rethinking Homework: Best Practices That Support Diverse Needs , thinks there should be more emphasis on improving the quality of homework tasks, and she supports efforts to eliminate homework for younger kids.

“I have no concerns about students not starting homework until fourth grade or fifth grade,” she said, noting that while the debate over homework will undoubtedly continue, she has noticed a trend toward limiting, if not eliminating, homework in elementary school.

The issue has been debated for decades. A TIME cover in 1999 read: “Too much homework! How it’s hurting our kids, and what parents should do about it.” The accompanying story noted that the launch of Sputnik in 1957 led to a push for better math and science education in the U.S. The ensuing pressure to be competitive on a global scale, plus the increasingly demanding college admissions process, fueled the practice of assigning homework.

“The complaints are cyclical, and we’re in the part of the cycle now where the concern is for too much,” Cooper said. “You can go back to the 1970s, when you’ll find there were concerns that there was too little, when we were concerned about our global competitiveness.”

Cooper acknowledged that some students really are bringing home too much homework, and their parents are right to be concerned.

“A good way to think about homework is the way you think about medications or dietary supplements,” he said. “If you take too little, they’ll have no effect. If you take too much, they can kill you. If you take the right amount, you’ll get better.”

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A Stanford education researcher found that too much homework can negatively affect kids, especially their lives away from school, where family, friends and activities matter. "Our findings on the effects of homework challenge the traditional assumption that homework is inherently good," wrote Denise Pope , a senior lecturer at the Stanford Graduate School of Education and a co-author of a study published in the Journal of Experimental Education . The researchers used survey data to examine perceptions about homework, student well-being and behavioral engagement in a sample of 4,317 students from 10 high-performing high schools in upper-middle-class California communities. Along with the survey data, Pope and her colleagues used open-ended answers to explore the students' views on homework. Median household income exceeded $90,000 in these communities, and 93 percent of the students went on to college, either two-year or four-year. Students in these schools average about 3.1 hours of homework each night. "The findings address how current homework practices in privileged, high-performing schools sustain students' advantage in competitive climates yet hinder learning, full engagement and well-being," Pope wrote. Pope and her colleagues found that too much homework can diminish its effectiveness and even be counterproductive. They cite prior research indicating that homework benefits plateau at about two hours per night, and that 90 minutes to two and a half hours is optimal for high school. Their study found that too much homework is associated with: • Greater stress : 56 percent of the students considered homework a primary source of stress, according to the survey data. Forty-three percent viewed tests as a primary stressor, while 33 percent put the pressure to get good grades in that category. Less than 1 percent of the students said homework was not a stressor. • Reductions in health : In their open-ended answers, many students said their homework load led to sleep deprivation and other health problems. The researchers asked students whether they experienced health issues such as headaches, exhaustion, sleep deprivation, weight loss and stomach problems. • Less time for friends, family and extracurricular pursuits : Both the survey data and student responses indicate that spending too much time on homework meant that students were "not meeting their developmental needs or cultivating other critical life skills," according to the researchers. Students were more likely to drop activities, not see friends or family, and not pursue hobbies they enjoy. A balancing act The results offer empirical evidence that many students struggle to find balance between homework, extracurricular activities and social time, the researchers said. Many students felt forced or obligated to choose homework over developing other talents or skills. Also, there was no relationship between the time spent on homework and how much the student enjoyed it. The research quoted students as saying they often do homework they see as "pointless" or "mindless" in order to keep their grades up. "This kind of busy work, by its very nature, discourages learning and instead promotes doing homework simply to get points," said Pope, who is also a co-founder of Challenge Success , a nonprofit organization affiliated with the GSE that conducts research and works with schools and parents to improve students' educational experiences.. Pope said the research calls into question the value of assigning large amounts of homework in high-performing schools. Homework should not be simply assigned as a routine practice, she said. "Rather, any homework assigned should have a purpose and benefit, and it should be designed to cultivate learning and development," wrote Pope. High-performing paradox In places where students attend high-performing schools, too much homework can reduce their time to foster skills in the area of personal responsibility, the researchers concluded. "Young people are spending more time alone," they wrote, "which means less time for family and fewer opportunities to engage in their communities." Student perspectives The researchers say that while their open-ended or "self-reporting" methodology to gauge student concerns about homework may have limitations – some might regard it as an opportunity for "typical adolescent complaining" – it was important to learn firsthand what the students believe. The paper was co-authored by Mollie Galloway from Lewis and Clark College and Jerusha Conner from Villanova University.

Clifton B. Parker is a writer at the Stanford News Service .

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The Science Of Homework: Why Timing is Everything

A previous article argued, paradoxically, that remembering can cause forgetting. Today’s entry reverses the paradox: forgetting, you see, benefits remembering.

You read that right: if you want to remember, it helps to forget.

Let me explain.

Today in class, I taught my students a new verb tense (or a new technique for proving that lines are parallel, or the Ideal Gas Law). I’ve got twenty practice problems for them to do: what’s the best schedule for those problems?

When I learned French (and Geometry, and Chemistry) in high school, the answer was clear: do all the practicing right now. Whatever I studied in class today, I should practice tonight. In other words, I did those 20 practice problems then night after I learned the new material.

There is, of course, another conceptual option: I could ask my students to spread that practice out over time. They could do five problems tonight, and five tomorrow night, and so on.

Either plan seems plausible: which was is better? Happily, teachers don’t have to guess—we can look at research.

Here’s an example 2 . Hal Pashler’s research team had students come to his lab to learn an unusual math procedure, and practice it by doing 10 problems. A week later, half of those students returned to take a quiz on this procedure; the other half of the students took the same quiz…a MONTH later.

Then, Pasher had another group of students learn the same unusual math procedure—which they practiced by doing 5 problems (not ten, five). They all returned a week later, and did five more practice problems. A week later, half of those students returned to take the quiz; the other half of the students, again, took that quiz a month later.

So, both groups studied the same procedure, and did ten practice problems. The only difference: the schedule on which they did that practicing. Half of them did all the practice at once; the others spread their practice out.

Which group did better?

To put that picture into fewer than a thousand words: by spreading their study out, the second group remembered twice as much as the first group did.

Why did this technique work? Simply put, the second group had time to forget . The first group spent all their time learning. The second group learned, and then forgot, and then learned again. The forgetting benefitted ultimate remembering.

Two serious problems, however, might interfere with our ability to put this research result to practice.

Problem number 1: the students.

Pasher’s research result feels intuitive to most teachers—we’ve always known its’s better to spread practice out over time—but it feels profoundly counter-intuitive to students. They feel deeply in their gut that they should practice, practice, practice RIGHT NOW.

To help students see the benefits of spacing their practice, I regularly show them Pasher’s study. Students LOVE the idea that they can double the amount they remember (61%, instead of 31%) without doing any more practice problems.

Problem number 2: the syllabus.

Although “The Spacing Effect” sounds like a good idea when I think about any one topic, it leads to a potential problem with my syllabus. In the old days, I’d teach one topic on Monday, and then have my students practice that topic Monday night. On Tuesday we’d do the next topic, and they’d practice it on Tuesday night. In short, my syllabus looked like this:

However, if spread my practice out—perhaps by doing 5 problems per topic each night—my new syllabus will look like this:

The result: Thursday’s homework is a mess. It seems entirely possible that Spacing benefits learning when you do it with one topic in the psychology lab, but that—when teachers try it in the classroom—the muddled syllabus might undermine all the benefits that Spacing should provide. In brief: Spacing Good, Muddling Bad.

Researcher Doug Rohrer has investigated this question, and here’s what he found 3 .

He had one group of students come to his lab to learn four unusual math procedures. These students read one tutorial, and did practice problems for that procedure; they then read the next tutorial, and did those practice problems, and so forth.

Another group read all four tutorials, and then did the same practice problems. However, their practice problems were all jumbled together:

You can see that the first group looks like my first syllabus: nicely organized; the second group looks like Thursday night on my second syllabus: a jumbled muddle. (Rohrer, more politely, calls this second structure “interleaved.”)

When it came to the practice problems, as I feared, the students in the jumbled group didn’t do very well: they got 60% of the problems right, compared to 88% in the traditionally organized group.

However, what happened when Rohrer’s groups came back two weeks later to take a test? The jumbled group, once again, remembered about 60%. The traditionally organized group remembered 20%.

Yes, 20%. Their score fell 66% in two weeks.

Why did that happen?

Two ideas seem most plausible.

First: Rohrer’s first group learned the four math procedures, but they didn’t practice deciding when to use each one. Because their practice problems always aligned with the technique they had just practiced, they never had to figure out when to use which one. So, two weeks later, they struggled to know which equation to use.

Second: Rohrer’s group had more opportunities to forget . Because their practice problems required them to switch from technique to technique, they never could get into a groove. Each problem, they had time to forget the techniques they weren’t practicing, and so had more opportunities to remember those techniques anew.

These two research pools lead to these conclusions: spacing benefits learning (because it allows forgetting). And, spacing requires a jumbled/interleaved syllabus—which also benefits learning (because, again, it allows forgetting).

A final note about research. The “Spacing Effect” is very well documented, and at this point is not controversial. The benefits of interleaving, however, have been shown by fewer studies; and some of the studies with high-school aged students have been equivocal 1 . But this much is clear; the combination of spacing & interleaving leads to more learning than the traditional syllabus.

Because, as you now remember, forgetting can help you learn.

References & Further Reading

Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students’ learning with effective learning techniques promising directions from cognitive and educational psychology. Psychological Science in the Public Interest , 14 (1), 4-58. [ Paper ]
Pashler, H., Rohrer, D., Cepeda, N. J., & Carpenter, S. K. (2007). Enhancing learning and retarding forgetting: Choices and consequences. Psychonomic bulletin & review , 14 (2), 187-193. [ Paper ]
Rohrer, D., & Pashler, H. (2010). Recent research on human learning challenges conventional instructional strategies. Educational Researcher , 39 (5), 406-412. [ Paper ]
Brown, P., Roediger, H. L., & McDaniel, M.A. (2014) Make it stick: The science of successful learning. Cambridge: The Belknap Press of Harvard University Press. [ Book ]
Carey , B. (2014). How we learn: The surprising truth about when, where, and why it happens . New York: Random House. [ Book ]

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ABOUT THE AUTHOR

Andrew watson.

Andrew began his classroom life as a high-school English teacher in 1988, and has been working in or near schools ever since. In 2008, Andrew began exploring the practical application of psychology and neuroscience in his classroom. In 2011, he earned his M. Ed. from the “Mind, Brain, Education” program at Harvard University. As President of “Translate the Brain,” Andrew now works with teachers, students, administrators, and parents to make learning easier and teaching more effective. He has presented at schools and workshops across the country; he also serves as an adviser to several organizations, including “The People’s Science.” Andrew is the author of "Learning Begins: The Science of Working Memory and Attention for the Classroom Teacher."

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September 1, 2021

What's the point of homework?

by Katina Zammit, Western Sydney University

Homework hasn't changed much in the past few decades. Most children are still sent home with about an hour's worth of homework each day, mostly practicing what they were taught in class.

If we look internationally, homework is assigned in every country that participated in the OECD's Programme for International Student Assessment (PISA) in 2012.

Across the participating countries, 15-year-old students reported spending almost five hours per week doing homework in 2012. Australian students spent six hours per week on average on homework. Students in Singapore spent seven hours on homework, and in Shanghai, China they did homework for about 14 hours per week on average.

Shanghai and Singapore routinely score higher than Australia in the PISA maths, science and reading tests. But homework could just be one of the factors leading to higher results. In Finland, which also scores higher than Australia, students spent less than three hours on homework per week.

So, what's the purpose of homework and what does the evidence say about whether it fulfills its purpose?

Why do teachers set homework?

Each school in Australia has its own homework policy developed in consultation with teachers and parents or caregivers, under the guiding principles of state or regional education departments.

For instance, according to the New South Wales homework policy "… tasks should be assigned by teachers with a specific, explicit learning purpose."

Homework in NSW should also be "purposeful and designed to meet specific learning goals," and "built on knowledge, skills and understanding developed in class." But there is limited, if any, guidance on how often homework should be set.

Research based on teacher interviews shows they set homework for a range of reasons. These include to:

establish and improve communication between parents and children about learning
help children be more responsible, confident and disciplined
practice or review material from class
determine children's understanding of the lesson and/or skills
introduce new material to be presented in class
provide students with opportunities to apply and integrate skills to new situations or interest areas
get students to use their own skills to create work.

So, does homework achieve what teachers intend it to?

Do we know if it 'works'?

Studies on homework are frequently quite general, and don't consider specific types of homework tasks. So it isn't easy to measure how effective homework could be, or to compare studies.

But there are several things we can say.

First, it's better if every student gets the kind of homework task that benefits them personally, such as one that helps them answer questions they had, or understand a problem they couldn't quite grasp in class. This promotes students' confidence and control of their own learning.

Giving students repetitive tasks may not have much value . For instance, calculating the answer to 120 similar algorithms, such as adding two different numbers 120 times may make the student think maths is irrelevant and boring. In this case, children are not being encouraged to find solutions but simply applying a formula they learnt in school.

In primary schools , homework that aims to improve children's confidence and learning discipline can be beneficial. For example, children can be asked to practice giving a presentation on a topic of their interest. This could help build their competence in speaking in front of a class.

Homework can also highlight equity issues. It can be particularly burdensome for socioeconomically disadvantaged students who may not have a space, the resources or as much time due to family and work commitments. Their parents may also not feel capable of supporting them or have their own work commitments.

According to the PISA studies mentioned earlier, socioeconomically disadvantaged 15 year olds spend nearly three hours less on homework each week than their advantaged peers.

What kind of homework is best?

Homework can be engaging and contribute to learning if it is more than just a sheet of maths or list of spelling words not linked to class learning. From summarizing various studies' findings, "good" homework should be:

personalized to each child rather than the same for all students in the class. This is more likely to make a difference to a child's learning and performance
achievable, so the child can complete it independently, building skills in managing their time and behavior
aligned to the learning in the classroom.

If you aren't happy with the homework your child is given then approach the school. If your child is having difficulty with doing the homework, the teacher needs to know. It shouldn't be burdensome for you or your children .

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Home > Blog > Tips for Online Students > The Pros and Cons of Homework

School Life Balance , Tips for Online Students

The Pros and Cons of Homework

Updated: July 16, 2024

Published: January 23, 2020

The-Pros-and-Cons-Should-Students-Have-Homework

Remember those nights when you’d find yourself staring at a mountain of homework, eyes drooping, wondering if you’d ever see the light at the end of the tunnel? The debate over homework’s role in education is as old as time. Is it a crucial tool for reinforcing learning or just an unnecessary burden?

For college students, this question takes on new dimensions. Juggling homework with the endless amount of classes, part-time jobs, and social lives can feel like walking on thin ice. The pressure to maintain grades, meet deadlines, and still find time for friends and relaxation can be overwhelming. So, is homework a friend or foe?

A college student completely swamped with homework.

Photo by energepic.com from Pexels

The homework dilemma.

A large amount of college students report feeling overwhelmed by their academic workload, leading to high levels of stress and anxiety. According to Research.com , 45% of college students in the U.S. experience “more than average” stress, with 36.5% citing stress as a major impediment to their academic performance. This stress often stems directly from the homework load, leading to symptoms like headaches, exhaustion, and difficulty sleeping. The intense pressure to manage homework alongside other responsibilities makes us question the true impact of homework on students’ overall well-being.

And then there’s the digital twist. A whopping 89% of students confessed to using AI tools like ChatGPT for their assignments. While these tools can be a godsend for quick answers and assistance, they can also undermine the personal effort and critical thinking necessary to truly understand the material.

On the brighter side, homework can be a powerful ally. According to Inside Higher Ed , structured assignments can actually help reduce stress by providing a clear learning roadmap and keeping students engaged with the material. But where’s the balance between helpful and harmful?

With these perspectives in mind, let’s dive into the pros and cons of homework for college students. By understanding both sides, we can find a middle ground that maximizes learning while keeping stress at bay.

The Pros of Homework

When thoughtfully assigned, homework can be a valuable tool in a student’s educational journey . Let’s explore how homework can be a beneficial companion to your studies:

Enhances Critical Thinking

Homework isn’t just busywork; it’s an opportunity to stretch your mental muscles. Those late-night problem sets and essays can actually encourage deeper understanding and application of concepts. Think of homework as a mental gym; each assignment is a new exercise, pushing you to analyze, synthesize, and evaluate information in ways that strengthen your critical thinking skills .

Time Management Skills

Do you ever juggle multiple deadlines and wonder how to keep it all together? Regular homework assignments can be a crash course in time management . They teach you to prioritize tasks, manage your schedule, and balance academic responsibilities with personal commitments. The ability to juggle various tasks is a skill that will serve you well beyond your college years.

Reinforcement of Learning

There’s a reason why practice makes perfect. Homework reinforces what you’ve learned in class, helping to cement concepts and theories in your mind. Understanding a concept during a lecture is one thing, but applying it through homework can deepen your comprehension and retention.

Preparation for Exams

Think of homework as a sound check and warm-up for exams. Regular assignments keep you engaged with the material, making it easier to review and prepare when exam time rolls around. By consistently working through problems and writing essays, you build a solid foundation that can make the difference between cramming and confident exam performance.

Encourages Independent Learning

Homework promotes a sense of responsibility and independence. It pushes you to tackle assignments on your own, encouraging problem-solving and self-discipline. This independence prepares you for the academic challenges ahead and the autonomy required in your professional and personal life.

A female student who doesn’t want to do homework.

The Cons of Homework

Despite its potential benefits, homework can also have significant downsides. Let’s examine the challenges and drawbacks of homework:

Impact on Mental Health

Homework can be a double-edged sword when it comes to mental health . While it’s meant to reinforce learning, the sheer volume of assignments can lead to stress and anxiety. The constant pressure to meet deadlines and the fear of falling behind can create a relentless cycle of stress. Many students become overwhelmed, leading to burnout and negatively impacting their overall well-being.

Limited Time for Other Activities

College isn’t just about hitting the books. It’s also a time for personal growth, exploring new interests, and building social connections. Excessive homework can eat into the time you might otherwise spend on extracurricular activities, hobbies, or simply hanging out with friends. This lack of balance can lead to a less fulfilling college experience. Shouldn’t education be about more than just academics?

Quality Over Quantity

When it comes to homework, more isn’t always better. Piling on assignments can lead to diminished returns on learning. Instead of diving deep into a subject and gaining a thorough understanding, students might rush through tasks just to get them done. This focus on quantity over quality can undermine the educational value of homework.

Inequity in Education

Homework can sometimes exacerbate educational inequalities. Not all students can access the same resources and support systems at home. While some might have a quiet space and access to the internet, others might struggle with distractions and lack of resources. This disparity can put certain students at a disadvantage, making homework more of a burden than a learning tool.

Dependence on AI Tools

With the advent of AI tools like ChatGPT , homework has taken on a new dimension. While these tools can provide quick answers and assistance, they also pose the risk of students becoming overly reliant on technology. This dependence can take away from the actual learning process, as students might bypass the critical thinking and effort needed to truly understand the material. Is convenience worth the potential loss in learning?

Finding the Balance

Finding the right balance with homework means tackling assignments that challenge and support you. Instead of drowning in a sea of tasks, focus on quality over quantity. Choose projects that spark your critical thinking and connect to real-world situations. Flexibility is key here. Recognize that your circumstances are unique, and adjusting your approach can help reduce stress and create a more inclusive learning environment. Constructive feedback makes homework more than just a chore; it turns it into a tool for growth and improvement.

It’s also about living a well-rounded college life. Don’t let homework overshadow other important parts of your life, like extracurricular activities or personal downtime. Emphasize independent learning and use technology wisely to prepare for future challenges. By balancing thoughtful assignments with your personal needs, homework can shift from being a burden to becoming a helpful companion on your educational journey, enriching your academic and personal growth.

Homework has its pros and cons, especially for college students. It can enhance critical thinking, time management, and learning, but it also brings stress, impacts mental health, and can become overwhelming. Finding the right balance is key.

Focus on quality assignments, maintain flexibility, and make sure your homework complements rather than dominates your life. With a thoughtful approach, homework can support your educational journey, fostering both academic success and personal growth.

How can I manage my time effectively to balance homework and other activities?

Create a schedule that allocates specific times for homework, classes, and personal activities. Use planners or digital calendars to keep track of deadlines and prioritize tasks. Don’t forget to include breaks to avoid burnout.

How can I reduce the stress associated with homework?

To manage stress, practice mindfulness techniques like meditation or deep breathing exercises. Break assignments into smaller, manageable tasks and tackle them one at a time. If needed, seek support from classmates, tutors, or mental health professionals.

Is using AI tools for homework cheating?

While AI tools like ChatGPT can be helpful for quick assistance, relying on them too much can hinder your learning process. Use them as a supplement rather than a replacement for your own effort and critical thinking.

How can teachers make homework more equitable?

Teachers can offer flexible deadlines, provide resources for students who lack them, and design assignments that account for different learning styles and home environments. Open communication between students and teachers can also help address individual challenges.

What are some strategies to make homework more meaningful?

Focus on quality over quantity by designing assignments that encourage deep thinking and application of knowledge. Integrate real-world problems to make homework more relevant and engaging. Provide constructive feedback to help students learn and grow from their assignments.

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A daughter sits at a desk doing homework while her mom stands beside her helping

Credit: August de Richelieu

Does homework still have value? A Johns Hopkins education expert weighs in

Joyce epstein, co-director of the center on school, family, and community partnerships, discusses why homework is essential, how to maximize its benefit to learners, and what the 'no-homework' approach gets wrong.

By Vicky Hallett

The necessity of homework has been a subject of debate since at least as far back as the 1890s, according to Joyce L. Epstein , co-director of the Center on School, Family, and Community Partnerships at Johns Hopkins University. "It's always been the case that parents, kids—and sometimes teachers, too—wonder if this is just busy work," Epstein says.

But after decades of researching how to improve schools, the professor in the Johns Hopkins School of Education remains certain that homework is essential—as long as the teachers have done their homework, too. The National Network of Partnership Schools , which she founded in 1995 to advise schools and districts on ways to improve comprehensive programs of family engagement, has developed hundreds of improved homework ideas through its Teachers Involve Parents in Schoolwork program. For an English class, a student might interview a parent on popular hairstyles from their youth and write about the differences between then and now. Or for science class, a family could identify forms of matter over the dinner table, labeling foods as liquids or solids. These innovative and interactive assignments not only reinforce concepts from the classroom but also foster creativity, spark discussions, and boost student motivation.

"We're not trying to eliminate homework procedures, but expand and enrich them," says Epstein, who is packing this research into a forthcoming book on the purposes and designs of homework. In the meantime, the Hub couldn't wait to ask her some questions:

What kind of homework training do teachers typically get?

Future teachers and administrators really have little formal training on how to design homework before they assign it. This means that most just repeat what their teachers did, or they follow textbook suggestions at the end of units. For example, future teachers are well prepared to teach reading and literacy skills at each grade level, and they continue to learn to improve their teaching of reading in ongoing in-service education. By contrast, most receive little or no training on the purposes and designs of homework in reading or other subjects. It is really important for future teachers to receive systematic training to understand that they have the power, opportunity, and obligation to design homework with a purpose.

Why do students need more interactive homework?

If homework assignments are always the same—10 math problems, six sentences with spelling words—homework can get boring and some kids just stop doing their assignments, especially in the middle and high school years. When we've asked teachers what's the best homework you've ever had or designed, invariably we hear examples of talking with a parent or grandparent or peer to share ideas. To be clear, parents should never be asked to "teach" seventh grade science or any other subject. Rather, teachers set up the homework assignments so that the student is in charge. It's always the student's homework. But a good activity can engage parents in a fun, collaborative way. Our data show that with "good" assignments, more kids finish their work, more kids interact with a family partner, and more parents say, "I learned what's happening in the curriculum." It all works around what the youngsters are learning.

Is family engagement really that important?

At Hopkins, I am part of the Center for Social Organization of Schools , a research center that studies how to improve many aspects of education to help all students do their best in school. One thing my colleagues and I realized was that we needed to look deeply into family and community engagement. There were so few references to this topic when we started that we had to build the field of study. When children go to school, their families "attend" with them whether a teacher can "see" the parents or not. So, family engagement is ever-present in the life of a school.

My daughter's elementary school doesn't assign homework until third grade. What's your take on "no homework" policies?

There are some parents, writers, and commentators who have argued against homework, especially for very young children. They suggest that children should have time to play after school. This, of course is true, but many kindergarten kids are excited to have homework like their older siblings. If they give homework, most teachers of young children make assignments very short—often following an informal rule of 10 minutes per grade level. "No homework" does not guarantee that all students will spend their free time in productive and imaginative play.

Some researchers and critics have consistently misinterpreted research findings. They have argued that homework should be assigned only at the high school level where data point to a strong connection of doing assignments with higher student achievement . However, as we discussed, some students stop doing homework. This leads, statistically, to results showing that doing homework or spending more minutes on homework is linked to higher student achievement. If slow or struggling students are not doing their assignments, they contribute to—or cause—this "result."

Teachers need to design homework that even struggling students want to do because it is interesting. Just about all students at any age level react positively to good assignments and will tell you so.

Did COVID change how schools and parents view homework?

Within 24 hours of the day school doors closed in March 2020, just about every school and district in the country figured out that teachers had to talk to and work with students' parents. This was not the same as homeschooling—teachers were still working hard to provide daily lessons. But if a child was learning at home in the living room, parents were more aware of what they were doing in school. One of the silver linings of COVID was that teachers reported that they gained a better understanding of their students' families. We collected wonderfully creative examples of activities from members of the National Network of Partnership Schools. I'm thinking of one art activity where every child talked with a parent about something that made their family unique. Then they drew their finding on a snowflake and returned it to share in class. In math, students talked with a parent about something the family liked so much that they could represent it 100 times. Conversations about schoolwork at home was the point.

How did you create so many homework activities via the Teachers Involve Parents in Schoolwork program?

We had several projects with educators to help them design interactive assignments, not just "do the next three examples on page 38." Teachers worked in teams to create TIPS activities, and then we turned their work into a standard TIPS format in math, reading/language arts, and science for grades K-8. Any teacher can use or adapt our prototypes to match their curricula.

Overall, we know that if future teachers and practicing educators were prepared to design homework assignments to meet specific purposes—including but not limited to interactive activities—more students would benefit from the important experience of doing their homework. And more parents would, indeed, be partners in education.

Posted in Voices+Opinion

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A Commentary on the Science and Practice of Homework in Cognitive Behavioral Therapy

Published: 18 March 2021
Volume 45 , pages 303–309, ( 2021 )

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Keith S. Dobson ORCID: orcid.org/0000-0001-9542-0822 1

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This article discusses the concept of homework in cognitive-behavioral therapy (CBT), and reviews the articles in this special issue of Cognitive Therapy and Research. The article underscores the pivotal role of between- session activities and demonstrates that this role has been recognized for many years.

This article reviews the articles from this special issue and uses them as a springboard to review other research and then discuss potential directions for future theory and research.

The initial research in this area focused on documenting the magnitude of the relationship between homework adherence and outcome in CBT. Research has now advanced to incorporate studies that examine issues such as homework competence, the complicated relationship between homework and other aspects of CBT such as the therapeutic relationship, and the use of technology to try to enhance homework completion and clinical outcomes.

Conclusions

The use of homework assignments in CBT remains a critical issue for development. Limitations of the literature are addressed, and directions for future research in the field are provided.

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A Comprehensive Model of Homework in Cognitive Behavior Therapy

Basic Principles and Practice of Cognitive Behavioral Therapy

Global Adaptation and Practice of Cognitive Behavioral Therapy: An Introduction

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Too Much Homework Is Bad for Kids

Piling on the homework doesn't help kids do better in school. In fact, it can lower their test scores.

That's the conclusion of a group of Australian researchers, who have taken the aggregate results of several recent studies investigating the relationship between time spent on homework and students' academic performance.

According to Richard Walker, an educational psychologist at Sydney University, data shows that in countries where more time is spent on homework, students score lower on a standardized test called the Program for International Student Assessment, or PISA. The same correlation is also seen when comparing homework time and test performance at schools within countries. Past studies have also demonstrated this basic trend.

Inundating children with hours of homework each night is detrimental, the research suggests, while an hour or two per week usually doesn't impact test scores one way or the other. However, homework only bolsters students' academic performance during their last three years of grade school. "There is little benefit for most students until senior high school (grades 10-12)," Walker told Life's Little Mysteries .

The research is detailed in his new book, "Reforming Homework: Practices, Learning and Policies" (Palgrave Macmillan, 2012).

The same basic finding holds true across the globe, including in the U.S., according to Gerald LeTendre of Pennsylvania State University. He and his colleagues have found that teachers typically give take-home assignments that are unhelpful busy work. Assigning homework "appeared to be a remedial strategy (a consequence of not covering topics in class, exercises for students struggling, a way to supplement poor quality educational settings), and not an advancement strategy (work designed to accelerate, improve or get students to excel)," LeTendre wrote in an email. [ Kids Believe Literally Everything They Read Online, Even Tree Octopuses ]

This type of remedial homework tends to produce marginally lower test scores compared with children who are not given the work. Even the helpful, advancing kind of assignments ought to be limited; Harris Cooper, a professor of education at Duke University, has recommended that students be given no more than 10 to 15 minutes of homework per night in second grade, with an increase of no more than 10 to 15 minutes in each successive year.

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Most homework's neutral or negative impact on students' academic performance implies there are better ways for them to spend their after school hours than completing worksheets. So, what should they be doing? According to LeTendre, learning to play a musical instrument or participating in clubs and sports all seem beneficial , but there's no one answer that applies to everyone.

"These after-school activities have much more diffuse goals than single subject test scores," he wrote. "When I talk to parents … they want their kids to be well-rounded, creative, happy individuals — not just kids who ace the tests."

Follow Natalie Wolchover on Twitter @ nattyover . Follow Life's Little Mysteries on Twitter @ llmysteries , then join us on Facebook .

Natalie Wolchover was a staff writer for Live Science from 2010 to 2012 and is currently a senior physics writer and editor for Quanta Magazine. She holds a bachelor's degree in physics from Tufts University and has studied physics at the University of California, Berkeley. Along with the staff of Quanta, Wolchover won the 2022 Pulitzer Prize for explanatory writing for her work on the building of the James Webb Space Telescope. Her work has also appeared in the The Best American Science and Nature Writing and The Best Writing on Mathematics, Nature, The New Yorker and Popular Science. She was the 2016 winner of the Evert Clark/Seth Payne Award, an annual prize for young science journalists, as well as the winner of the 2017 Science Communication Award for the American Institute of Physics.

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The Cult of Homework

America’s devotion to the practice stems in part from the fact that it’s what today’s parents and teachers grew up with themselves.

America has long had a fickle relationship with homework. A century or so ago, progressive reformers argued that it made kids unduly stressed , which later led in some cases to district-level bans on it for all grades under seventh. This anti-homework sentiment faded, though, amid mid-century fears that the U.S. was falling behind the Soviet Union (which led to more homework), only to resurface in the 1960s and ’70s, when a more open culture came to see homework as stifling play and creativity (which led to less). But this didn’t last either: In the ’80s, government researchers blamed America’s schools for its economic troubles and recommended ramping homework up once more.

The 21st century has so far been a homework-heavy era, with American teenagers now averaging about twice as much time spent on homework each day as their predecessors did in the 1990s . Even little kids are asked to bring school home with them. A 2015 study , for instance, found that kindergarteners, who researchers tend to agree shouldn’t have any take-home work, were spending about 25 minutes a night on it.

But not without pushback. As many children, not to mention their parents and teachers, are drained by their daily workload, some schools and districts are rethinking how homework should work—and some teachers are doing away with it entirely. They’re reviewing the research on homework (which, it should be noted, is contested) and concluding that it’s time to revisit the subject.

Read: My daughter’s homework is killing me

Hillsborough, California, an affluent suburb of San Francisco, is one district that has changed its ways. The district, which includes three elementary schools and a middle school, worked with teachers and convened panels of parents in order to come up with a homework policy that would allow students more unscheduled time to spend with their families or to play. In August 2017, it rolled out an updated policy, which emphasized that homework should be “meaningful” and banned due dates that fell on the day after a weekend or a break.

“The first year was a bit bumpy,” says Louann Carlomagno, the district’s superintendent. She says the adjustment was at times hard for the teachers, some of whom had been doing their job in a similar fashion for a quarter of a century. Parents’ expectations were also an issue. Carlomagno says they took some time to “realize that it was okay not to have an hour of homework for a second grader—that was new.”

Most of the way through year two, though, the policy appears to be working more smoothly. “The students do seem to be less stressed based on conversations I’ve had with parents,” Carlomagno says. It also helps that the students performed just as well on the state standardized test last year as they have in the past.

Earlier this year, the district of Somerville, Massachusetts, also rewrote its homework policy, reducing the amount of homework its elementary and middle schoolers may receive. In grades six through eight, for example, homework is capped at an hour a night and can only be assigned two to three nights a week.

Jack Schneider, an education professor at the University of Massachusetts at Lowell whose daughter attends school in Somerville, is generally pleased with the new policy. But, he says, it’s part of a bigger, worrisome pattern. “The origin for this was general parental dissatisfaction, which not surprisingly was coming from a particular demographic,” Schneider says. “Middle-class white parents tend to be more vocal about concerns about homework … They feel entitled enough to voice their opinions.”

Schneider is all for revisiting taken-for-granted practices like homework, but thinks districts need to take care to be inclusive in that process. “I hear approximately zero middle-class white parents talking about how homework done best in grades K through two actually strengthens the connection between home and school for young people and their families,” he says. Because many of these parents already feel connected to their school community, this benefit of homework can seem redundant. “They don’t need it,” Schneider says, “so they’re not advocating for it.”

That doesn’t mean, necessarily, that homework is more vital in low-income districts. In fact, there are different, but just as compelling, reasons it can be burdensome in these communities as well. Allison Wienhold, who teaches high-school Spanish in the small town of Dunkerton, Iowa, has phased out homework assignments over the past three years. Her thinking: Some of her students, she says, have little time for homework because they’re working 30 hours a week or responsible for looking after younger siblings.

As educators reduce or eliminate the homework they assign, it’s worth asking what amount and what kind of homework is best for students. It turns out that there’s some disagreement about this among researchers, who tend to fall in one of two camps.

In the first camp is Harris Cooper, a professor of psychology and neuroscience at Duke University. Cooper conducted a review of the existing research on homework in the mid-2000s , and found that, up to a point, the amount of homework students reported doing correlates with their performance on in-class tests. This correlation, the review found, was stronger for older students than for younger ones.

This conclusion is generally accepted among educators, in part because it’s compatible with “the 10-minute rule,” a rule of thumb popular among teachers suggesting that the proper amount of homework is approximately 10 minutes per night, per grade level—that is, 10 minutes a night for first graders, 20 minutes a night for second graders, and so on, up to two hours a night for high schoolers.

In Cooper’s eyes, homework isn’t overly burdensome for the typical American kid. He points to a 2014 Brookings Institution report that found “little evidence that the homework load has increased for the average student”; onerous amounts of homework, it determined, are indeed out there, but relatively rare. Moreover, the report noted that most parents think their children get the right amount of homework, and that parents who are worried about under-assigning outnumber those who are worried about over-assigning. Cooper says that those latter worries tend to come from a small number of communities with “concerns about being competitive for the most selective colleges and universities.”

According to Alfie Kohn, squarely in camp two, most of the conclusions listed in the previous three paragraphs are questionable. Kohn, the author of The Homework Myth: Why Our Kids Get Too Much of a Bad Thing , considers homework to be a “reliable extinguisher of curiosity,” and has several complaints with the evidence that Cooper and others cite in favor of it. Kohn notes, among other things, that Cooper’s 2006 meta-analysis doesn’t establish causation, and that its central correlation is based on children’s (potentially unreliable) self-reporting of how much time they spend doing homework. (Kohn’s prolific writing on the subject alleges numerous other methodological faults.)

In fact, other correlations make a compelling case that homework doesn’t help. Some countries whose students regularly outperform American kids on standardized tests, such as Japan and Denmark, send their kids home with less schoolwork , while students from some countries with higher homework loads than the U.S., such as Thailand and Greece, fare worse on tests. (Of course, international comparisons can be fraught because so many factors, in education systems and in societies at large, might shape students’ success.)

Kohn also takes issue with the way achievement is commonly assessed. “If all you want is to cram kids’ heads with facts for tomorrow’s tests that they’re going to forget by next week, yeah, if you give them more time and make them do the cramming at night, that could raise the scores,” he says. “But if you’re interested in kids who know how to think or enjoy learning, then homework isn’t merely ineffective, but counterproductive.”

His concern is, in a way, a philosophical one. “The practice of homework assumes that only academic growth matters, to the point that having kids work on that most of the school day isn’t enough,” Kohn says. What about homework’s effect on quality time spent with family? On long-term information retention? On critical-thinking skills? On social development? On success later in life? On happiness? The research is quiet on these questions.

Another problem is that research tends to focus on homework’s quantity rather than its quality, because the former is much easier to measure than the latter. While experts generally agree that the substance of an assignment matters greatly (and that a lot of homework is uninspiring busywork), there isn’t a catchall rule for what’s best—the answer is often specific to a certain curriculum or even an individual student.

Given that homework’s benefits are so narrowly defined (and even then, contested), it’s a bit surprising that assigning so much of it is often a classroom default, and that more isn’t done to make the homework that is assigned more enriching. A number of things are preserving this state of affairs—things that have little to do with whether homework helps students learn.

Jack Schneider, the Massachusetts parent and professor, thinks it’s important to consider the generational inertia of the practice. “The vast majority of parents of public-school students themselves are graduates of the public education system,” he says. “Therefore, their views of what is legitimate have been shaped already by the system that they would ostensibly be critiquing.” In other words, many parents’ own history with homework might lead them to expect the same for their children, and anything less is often taken as an indicator that a school or a teacher isn’t rigorous enough. (This dovetails with—and complicates—the finding that most parents think their children have the right amount of homework.)

Barbara Stengel, an education professor at Vanderbilt University’s Peabody College, brought up two developments in the educational system that might be keeping homework rote and unexciting. The first is the importance placed in the past few decades on standardized testing, which looms over many public-school classroom decisions and frequently discourages teachers from trying out more creative homework assignments. “They could do it, but they’re afraid to do it, because they’re getting pressure every day about test scores,” Stengel says.

Second, she notes that the profession of teaching, with its relatively low wages and lack of autonomy, struggles to attract and support some of the people who might reimagine homework, as well as other aspects of education. “Part of why we get less interesting homework is because some of the people who would really have pushed the limits of that are no longer in teaching,” she says.

“In general, we have no imagination when it comes to homework,” Stengel says. She wishes teachers had the time and resources to remake homework into something that actually engages students. “If we had kids reading—anything, the sports page, anything that they’re able to read—that’s the best single thing. If we had kids going to the zoo, if we had kids going to parks after school, if we had them doing all of those things, their test scores would improve. But they’re not. They’re going home and doing homework that is not expanding what they think about.”

“Exploratory” is one word Mike Simpson used when describing the types of homework he’d like his students to undertake. Simpson is the head of the Stone Independent School, a tiny private high school in Lancaster, Pennsylvania, that opened in 2017. “We were lucky to start a school a year and a half ago,” Simpson says, “so it’s been easy to say we aren’t going to assign worksheets, we aren’t going assign regurgitative problem sets.” For instance, a half-dozen students recently built a 25-foot trebuchet on campus.

Simpson says he thinks it’s a shame that the things students have to do at home are often the least fulfilling parts of schooling: “When our students can’t make the connection between the work they’re doing at 11 o’clock at night on a Tuesday to the way they want their lives to be, I think we begin to lose the plot.”

When I talked with other teachers who did homework makeovers in their classrooms, I heard few regrets. Brandy Young, a second-grade teacher in Joshua, Texas, stopped assigning take-home packets of worksheets three years ago, and instead started asking her students to do 20 minutes of pleasure reading a night. She says she’s pleased with the results, but she’s noticed something funny. “Some kids,” she says, “really do like homework.” She’s started putting out a bucket of it for students to draw from voluntarily—whether because they want an additional challenge or something to pass the time at home.

Chris Bronke, a high-school English teacher in the Chicago suburb of Downers Grove, told me something similar. This school year, he eliminated homework for his class of freshmen, and now mostly lets students study on their own or in small groups during class time. It’s usually up to them what they work on each day, and Bronke has been impressed by how they’ve managed their time.

In fact, some of them willingly spend time on assignments at home, whether because they’re particularly engaged, because they prefer to do some deeper thinking outside school, or because they needed to spend time in class that day preparing for, say, a biology test the following period. “They’re making meaningful decisions about their time that I don’t think education really ever gives students the experience, nor the practice, of doing,” Bronke said.

The typical prescription offered by those overwhelmed with homework is to assign less of it—to subtract. But perhaps a more useful approach, for many classrooms, would be to create homework only when teachers and students believe it’s actually needed to further the learning that takes place in class—to start with nothing, and add as necessary.

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How does homework affect students.

Posted by Kenny Gill

Homework is essential in the learning process of all students. It benefits them in managing time, being organized, and thinking beyond the classroom work. When students develop good habits towards homework, they enjoy good grades. The amount of homework given to students has risen by 51 percent. In most cases, this pushes them to order for custom essays online. A lot of homework can be overwhelming, affecting students in negative ways.

How homework affects the psyche of students Homework plays a crucial role in ensuring students succeeds both inside and outside the classroom. The numerous hours they spend in class, on school work, and away from family and friends lead to them experiencing exhaustion. Too much homework leads to students becoming disheartened by the school, and it chips away at their motivation for succeeding.

As a result, homework becomes an uphill battle, which they feel they will never win despite putting an effort. When they continue to find homework difficult, they consider other ways of working on it, such as cheating.

Getting enough time to relax, engage with friends and family members helps the students to have fun, thus, raising their spirit and their psyche on school work. However, when homework exceeds, it affects their emotional well-being making them sad and unproductive students who would rather cheat their way through school.

As a result, they have to struggle with a lack of enough sleep, loss of weight, stomach problems, headaches, and fatigue. Poor eating habits where students rely on fast foods also occasions as they struggle to complete all their assignments. When combined with lack of physical activity, the students suffer from obesity and other health-related conditions. Also, they experience depression and anxiety. The pressure to attend all classes, finish the much homework, as well as have time to make social connections cripples them.

How can parents help with homework? Being an active parent in the life of your child goes a long way towards promoting the health and well-being of children. Participating in their process of doing homework helps you identify if your child is facing challenges, and provide the much-needed support.

The first step is identifying the problem your child has by establishing whether their homework is too much. In elementary school, students should not spend over twenty minutes on homework while in high school they should spend an average of two hours. If it exceeds these guidelines, then you know that the homework is too much and you need to talk with the teachers.

The other step is ensuring your child focuses on their work by eliminating distractions. Texting with friends, watching videos, and playing video games can distract your child. Next, help them create a homework routine by having a designated area for studying and organizing their time for each activity.

Why it is better to do homework with friends Extracurricular activities such as sports and volunteer work that students engage in are vital. The events allow them to refresh their minds, catch up, and share with friends, and sharpen their communication skills. Homework is better done with friends as it helps them get these benefits. Through working together, interacting, and sharing with friends, their stress reduces.

Working on assignments with friends relaxes the students. It ensures they have the help they need when tackling the work, making even too much homework bearable. Also, it develops their communication skills. Deterioration of communication skills is a prominent reason as to why homework is bad. Too much of it keeps one away from classmates and friends, making it difficult for one to communicate with other people.

Working on homework with friends, however, ensures one learns how to express themselves and solve issues, making one an excellent communicator.

How does a lot of homework affect students’ performance? Burnout is a negative effect of homework. After spending the entire day learning, having to spend more hours doing too much homework lead to burnout. When it occurs, students begin dragging their feet when it comes to working on assignments and in some cases, fail to complete them. Therefore, they end up getting poor grades, which affects their overall performance.

Excessive homework also overshadows active learning, which is essential in the learning process. It encourages active participation of students in analyzing and applying what they learn in class in the real world. As a result, this limits the involvement of parents in the process of learning and children collaboration with friends. Instead, it causes boredom, difficulties for the students to work alongside others, and lack of skills in solving problems.

Should students have homework? Well, this is the question many parents and students ask when they consider these adverse effects of homework. Homework is vital in the learning process of any student. However, in most cases, it has crossed the line from being a tool for learning and becomes a source of suffering for students. With such effects, a balance is necessary to help students learn, remain healthy, and be all rounded individuals in society.

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One Response to How does homework affect students?

Great info and really valuable for teachers and tutors. This is a really very wonderful post. I really appreciate it; this post is very helpful for education.

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Understanding Science

How science REALLY works...

Understanding Science 101
Misconceptions
Testing ideas with evidence from the natural world is at the core of science.
Scientific testing involves figuring out what we would expect to observe if an idea were correct and comparing that expectation to what we actually observe.
Scientific arguments are built from an idea and the evidence relevant to that idea.
Scientific arguments can be built in any order. Sometimes a scientific idea precedes any evidence relevant to it, and other times the evidence helps inspire the idea.

Misconception: Science proves ideas.

Misconception: Science can only disprove ideas.

Correction: Science neither proves nor disproves. It accepts or rejects ideas based on supporting and refuting evidence, but may revise those conclusions if warranted by new evidence or perspectives. Read more about it.

The core of science: Relating evidence and ideas

In this case, the term argument refers not to a disagreement between two people, but to an evidence-based line of reasoning — so scientific arguments are more like the closing argument in a court case (a logical description of what we think and why we think it) than they are like the fights you may have had with siblings. Scientific arguments involve three components: the idea (a hypothesis or theory), the expectations generated by that idea (frequently called predictions), and the actual observations relevant to those expectations (the evidence). These components are always related in the same logical way:

What would we expect to see if this idea were true (i.e., what is our expected observation)?
What do we actually observe?
Do our expectations match our observations?

PREDICTIONS OR EXPECTATIONS?

When scientists describe their arguments, they frequently talk about their expectations in terms of what a hypothesis or theory predicts: “If it were the case that smoking causes lung cancer, then we’d predict that countries with higher rates of smoking would have higher rates of lung cancer.” At first, it might seem confusing to talk about a prediction that doesn’t deal with the future, but that refers to something going on right now or that may have already happened. In fact, this is just another way of discussing the expectations that the hypothesis or theory generates. So when a scientist talks about the predicted rates of lung cancer, he or she really means something like “the rates that we’d expect to see if our hypothesis were correct.”

If the idea generates expectations that hold true (are actually observed), then the idea is more likely to be accurate. If the idea generates expectations that don’t hold true (are not observed), then we are less likely to accept the idea. For example, consider the idea that cells are the building blocks of life. If that idea were true, we’d expect to see cells in all kinds of living tissues observed under a microscope — that’s our expected observation. In fact, we do observe this (our actual observation), so evidence supports the idea that living things are built from cells.

Though the structure of this argument is consistent (hypothesis, then expectation, then actual observation), its pieces may be assembled in different orders. For example, the first observations of cells were made in the 1600s, but cell theory was not postulated until 200 years later — so in this case, the evidence actually helped inspire the idea. Whether the idea comes first or the evidence comes first, the logic relating them remains the same.

Here, we’ll explore scientific arguments and how to build them. You can investigate:

Putting the pieces together: The hard work of building arguments

Predicting the past
Arguments with legs to stand on

Or just click the Next button to dive right in!

Take a sidetrip
Teaching resources

Scientific arguments rely on testable ideas. To learn what makes an idea testable, review our Science Checklist .

Forming hypotheses — scientific explanations — can be difficult for students. It is often easier for students to generate an expectation (what they think will happen or what they expect to observe) based on prior experience than to formulate a potential explanation for that phenomena. You can help students go beyond expectations to generate real, explanatory hypotheses by providing sentence stems for them to fill in: “I expect to observe A because B.” Once students have filled in this sentence you can explain that B is a hypothesis and A is the expectation generated by that hypothesis.
You can help students learn to distinguish between hypotheses and the expectations generated by them by regularly asking students to analyze lecture material, text, or video. Students should try to figure out which aspects of the content were hypotheses and which were expectations.

Summing up the process

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Summer holiday science: turn your home into a lab with these three easy experiments

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Audrey O'Grady receives funding from Science Foundation Ireland. She is affiliated with Department of Biological Sciences, University of Limerick.

University of Limerick provides funding as a member of The Conversation UK.

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Many people think science is difficult and needs special equipment, but that’s not true.

Science can be explored at home using everyday materials. Everyone, especially children, naturally ask questions about the world around them, and science offers a structured way to find answers.

Misconceptions about the difficulty of science often stem from a lack of exposure to its fun and engaging side. Science can be as simple as observing nature, mixing ingredients or exploring the properties of objects. It’s not just for experts in white coats, but for everyone.

Don’t take my word for it. Below are three experiments that can be done at home with children who are primary school age and older.

Extract DNA from bananas

DNA is all the genetic information inside cells. Every living thing has DNA, including bananas.

Did you know you can extract DNA from banana cells?

What you need: ¼ ripe banana, Ziploc bag, salt, water, washing-up liquid, rubbing alcohol (from a pharmacy), coffee filter paper, stirrer.

What you do:

Place a pinch of salt into about 20ml of water in a cup.

Add the salty water to the Ziploc bag with a quarter of a banana and mash the banana up with the salty water inside the bag, using your hands. Mashing the banana separates out the banana cells. The salty water helps clump the DNA together.

Once the banana is mashed up well, pour the banana and salty water into a coffee filter (you can lay the filter in the cup you used to make the salty water). Filtering removes the big clumps of banana cells.

Once a few ml have filtered out, add a drop of washing-up liquid and swirl gently. Washing-up liquid breaks down the fats in the cell membranes which makes the DNA separate from the other parts of the cell.

Slowly add some rubbing alcohol (about 10ml) to the filtered solution. DNA is insoluble in alcohol, therefore the DNA will clump together away from the alcohol and float, making it easy to see.

DNA will start to precipitate out looking slightly cloudy and stringy. What you’re seeing is thousands of DNA strands – the strands are too small to be seen even with a normal microscope. Scientists use powerful equipment to see individual strands.

Learn how plants ‘drink’ water

What you need: celery stalks (with their leaves), glass or clear cup, water, food dye, camera.

Fill the glass ¾ full with water and add 10 drops of food dye.
Place a celery stalk into the glass of coloured water. Take a photograph of the celery.
For two to three days, photograph the celery at the same time every day. Make sure you take a photograph at the very start of the experiment.

What happens and why?

All plants, such as celery, have vertical tubes that act like a transport system. These narrow tubes draw up water using a phenomenon known as capillarity.

Imagine you have a thin straw and you dip it into a glass of water. Have you ever noticed how the water climbs up the straw a little bit, even though you didn’t suck on it? This is because of capillarity.

In plants, capillarity helps move water from the roots to the leaves. Plants have tiny tubes inside them, like thin straws, called capillaries. The water sticks to the sides of these tubes and climbs up. In your experiment, you will see the food dye in the water make its way to the leaves.

Build a balloon-powered racecar

What you need: tape, scissors, two skewers, cardboard, four bottle caps, one straw, one balloon.

Cut the cardboard to about 10cm long and 5cm wide. This will form the base of your car.
Make holes in the centre of four bottle caps. These are your wheels.
To make the axles insert the wooden skewers through the holes in the cap. You will need to cut the skewers to fit the width of the cardboard base, but leave room for the wheels.
Secure the wheels to the skewers with tape.
Attach the axles to the underside of the car base with tape, ensuring the wheels can spin freely.
Insert a straw into the opening of a balloon and secure it with tape, ensuring there are no air leaks.
Attach the other end of the straw to the top of the car base, positioning it so the balloon can inflate and deflate towards the back of the car. Secure the straw with tape.
Inflate the balloon through the straw, pinch the straw to hold the air, place the car on a flat surface, then release the straw.

The inflated balloon stores potential energy when blown up. When the air is released, Newton’s third law of motion kicks into gear: for every action, there is an equal and opposite reaction.

As the air rushes out of the balloon (action), it pushes the car in the opposite direction (reaction). The escaping air propels the car forward, making it move across the surface.

Science experiments

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Homework is essential in the learning process of all students. It benefits them in managing time, being organized, and thinking beyond the classroom work. When students develop good habits towards homework, they enjoy good grades. The amount of homework given to students has risen by 51 percent. In most cases, this pushes them to order for ...
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Audrey O'Grady receives funding from Science Foundation Ireland. She is affiliated with Department of Biological Sciences, University of Limerick. Many people think science is difficult and needs ...