does too much homework lower test scores

Trending Today

Spending Too Much Time on Homework Linked to Lower Test Scores

A new study suggests the benefits to homework peak at an hour a day. After that, test scores decline.

Samantha Larson

Polls show that American public high school teachers assign their students an average of 3.5 hours of homework a day . According to a  recent study from the University of Oviedo in Spain, that’s far too much.

While doing some homework does indeed lead to higher test performance, the researchers found the benefits to hitting the books peak at about an hour a day. In surveying the homework habits of 7,725 adolescents, this study suggests that for students who average more than 100 minutes a day on homework, test scores start to decline. The relationship between spending time on homework and scoring well on a test is not linear, but curved.

This study builds upon previous research that suggests spending too much time on homework leads to higher stress, health problems and even social alienation. Which, paradoxically, means the most studious of students are in fact engaging in behavior that is counterproductive to doing well in school. 

Because the adolescents surveyed in the new study were only tested once, the researchers point out that their results only indicate the correlation between test scores and homework, not necessarily causation. Co-author Javier Suarez-Alvarez thinks the most important findings have less to do with the  amount of homework than with how that homework is done.

From Education Week :

Students who did homework more frequently – i.e., every day – tended to do better on the test than those who did it less frequently, the researchers found. And even more important was how much help students received on their homework – those who did it on their own preformed better than those who had parental involvement. (The study controlled for factors such as gender and socioeconomic status.)

“Once individual effort and autonomous working is considered, the time spent [on homework] becomes irrelevant,” Suarez-Alvarez says. After they get their daily hour of homework in, maybe students should just throw the rest of it to the dog.  

Get the latest stories in your inbox every weekday.

Samantha Larson | | READ MORE

Samantha Larson is a freelance writer who particularly likes to cover science, the environment, and adventure. For more of her work, visit SamanthaLarson.com

Too Much Homework Can Lower Test Scores, Researchers Say

By: Natalie Wolchover Published: 03/30/2012 09:42 AM EDT on Lifes Little Mysteries

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.

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 .

• Easy Answers to the Top 5 Science Questions Kids Ask
• Smart Answers for Crazy Hypothetical Questions
• Pointing Your Finger Makes You Credible to Kids

Copyright 2012 Lifes Little Mysteries, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Support HuffPost

Our 2024 coverage needs you, your loyalty means the world to us.

At HuffPost, we believe that everyone needs high-quality journalism, but we understand that not everyone can afford to pay for expensive news subscriptions. That is why we are committed to providing deeply reported, carefully fact-checked news that is freely accessible to everyone.

Whether you come to HuffPost for updates on the 2024 presidential race, hard-hitting investigations into critical issues facing our country today, or trending stories that make you laugh, we appreciate you. The truth is, news costs money to produce, and we are proud that we have never put our stories behind an expensive paywall.

Would you join us to help keep our stories free for all? Your contribution of as little as $2 will go a long way.

Can't afford to donate? Support HuffPost by creating a free account and log in while you read.

As Americans head to the polls in 2024, the very future of our country is at stake. At HuffPost, we believe that a free press is critical to creating well-informed voters. That's why our journalism is free for everyone, even though other newsrooms retreat behind expensive paywalls.

Our journalists will continue to cover the twists and turns during this historic presidential election. With your help, we'll bring you hard-hitting investigations, well-researched analysis and timely takes you can't find elsewhere. Reporting in this current political climate is a responsibility we do not take lightly, and we thank you for your support.

Contribute as little as $2 to keep our news free for all.

Dear HuffPost Reader

Thank you for your past contribution to HuffPost. We are sincerely grateful for readers like you who help us ensure that we can keep our journalism free for everyone.

The stakes are high this year, and our 2024 coverage could use continued support. Would you consider becoming a regular HuffPost contributor?

The stakes are high this year, and our 2024 coverage could use continued support. If circumstances have changed since you last contributed, we hope you’ll consider contributing to HuffPost once more.

Already contributed? Log in to hide these messages.

Before You Go

Popular in the community, from our partner, more in science.

• Future Students
• Current Students
• Faculty/Staff

News and Media

• News & Media Home
• Research Stories
• School's In
• In the Media

You are here

More than two hours of homework may be counterproductive, research suggests.

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 .

More Stories

⟵ Go to all Research Stories

Get the Educator

Subscribe to our monthly newsletter.

Stanford Graduate School of Education

482 Galvez Mall Stanford, CA 94305-3096 Tel: (650) 723-2109

Improving lives through learning

• Contact Admissions
• GSE Leadership
• Site Feedback
• Web Accessibility
• Career Resources
• Faculty Open Positions
• Explore Courses
• Academic Calendar
• Office of the Registrar
• Cubberley Library
• StanfordWho
• StanfordYou

• Stanford Home
• Maps & Directions
• Search Stanford
• Emergency Info
• Terms of Use
• Non-Discrimination
• Accessibility

© Stanford University , Stanford , California 94305 .

Search form

• Find Stories
• For Journalists

Stanford research shows pitfalls of homework

A Stanford researcher found that students in high-achieving communities who spend too much time on homework experience more stress, physical health problems, a lack of balance and even alienation from society. More than two hours of homework a night may be counterproductive, according to the study.

Education scholar Denise Pope has found that too much homework has negative effects on student well-being and behavioral engagement. (Image credit: L.A. Cicero)

A Stanford 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,” Pope said.

She 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.

Does Homework Improve Academic Achievement?

• Share this story on facebook
• Share this story on twitter
• Share this story on reddit
• Share this story on linkedin
• Get this story's permalink
• Print this story

Educators should be thrilled by these numbers. Pleasing a majority of parents regarding homework and having equal numbers of dissenters shouting "too much!" and "too little!" is about as good as they can hope for.

But opinions cannot tell us whether homework works; only research can, which is why my colleagues and I have conducted a combined analysis of dozens of homework studies to examine whether homework is beneficial and what amount of homework is appropriate for our children.

The homework question is best answered by comparing students who are assigned homework with students assigned no homework but who are similar in other ways. The results of such studies suggest that homework can improve students' scores on the class tests that come at the end of a topic. Students assigned homework in 2nd grade did better on math, 3rd and 4th graders did better on English skills and vocabulary, 5th graders on social studies, 9th through 12th graders on American history, and 12th graders on Shakespeare.

Less authoritative are 12 studies that link the amount of homework to achievement, but control for lots of other factors that might influence this connection. These types of studies, often based on national samples of students, also find a positive link between time on homework and achievement.

Yet other studies simply correlate homework and achievement with no attempt to control for student differences. In 35 such studies, about 77 percent find the link between homework and achievement is positive. Most interesting, though, is these results suggest little or no relationship between homework and achievement for elementary school students.

Why might that be? Younger children have less developed study habits and are less able to tune out distractions at home. Studies also suggest that young students who are struggling in school take more time to complete homework assignments simply because these assignments are more difficult for them.

These recommendations are consistent with the conclusions reached by our analysis. Practice assignments do improve scores on class tests at all grade levels. A little amount of homework may help elementary school students build study habits. Homework for junior high students appears to reach the point of diminishing returns after about 90 minutes a night. For high school students, the positive line continues to climb until between 90 minutes and 2½ hours of homework a night, after which returns diminish.

Beyond achievement, proponents of homework argue that it can have many other beneficial effects. They claim it can help students develop good study habits so they are ready to grow as their cognitive capacities mature. It can help students recognize that learning can occur at home as well as at school. Homework can foster independent learning and responsible character traits. And it can give parents an opportunity to see what's going on at school and let them express positive attitudes toward achievement.

Opponents of homework counter that it can also have negative effects. They argue it can lead to boredom with schoolwork, since all activities remain interesting only for so long. Homework can deny students access to leisure activities that also teach important life skills. Parents can get too involved in homework -- pressuring their child and confusing him by using different instructional techniques than the teacher.

My feeling is that homework policies should prescribe amounts of homework consistent with the research evidence, but which also give individual schools and teachers some flexibility to take into account the unique needs and circumstances of their students and families. In general, teachers should avoid either extreme.

Link to this page

Copy and paste the URL below to share this page.

Study: Homework Doesn’t Mean Better Grades, But Maybe Better Standardized Test Scores

Robert H. Tai, associate professor of science education at UVA's Curry School of Education

The time students spend on math and science homework doesn’t necessarily mean better grades, but it could lead to better performance on standardized tests, a new study finds.

“When Is Homework Worth The Time?” was recently published by lead investigator Adam Maltese, assistant professor of science education at Indiana University, and co-authors Robert H. Tai, associate professor of science education at the University of Virginia’s Curry School of Education , and Xitao Fan, dean of education at the University of Macau. Maltese is a Curry alumnus, and Fan is a former Curry faculty member.

The authors examined survey and transcript data of more than 18,000 10th-grade students to uncover explanations for academic performance. The data focused on individual classes, examining student outcomes through the transcripts from two nationwide samples collected in 1990 and 2002 by the National Center for Education Statistics.

Contrary to much published research, a regression analysis of time spent on homework and the final class grade found no substantive difference in grades between students who complete homework and those who do not. But the analysis found a positive association between student performance on standardized tests and the time they spent on homework.

“Our results hint that maybe homework is not being used as well as it could be,” Maltese said.

Tai said that homework assignments cannot replace good teaching.

“I believe that this finding is the end result of a chain of unfortunate educational decisions, beginning with the content coverage requirements that push too much information into too little time to learn it in the classroom,” Tai said. “The overflow typically results in more homework assignments. However, students spending more time on something that is not easy to understand or needs to be explained by a teacher does not help these students learn and, in fact, may confuse them.

“The results from this study imply that homework should be purposeful,” he added, “and that the purpose must be understood by both the teacher and the students.”

The authors suggest that factors such as class participation and attendance may mitigate the association of homework to stronger grade performance. They also indicate the types of homework assignments typically given may work better toward standardized test preparation than for retaining knowledge of class material.

Maltese said the genesis for the study was a concern about whether a traditional and ubiquitous educational practice, such as homework, is associated with students achieving at a higher level in math and science. Many media reports about education compare U.S. students unfavorably to high-achieving math and science students from across the world. The 2007 documentary film “Two Million Minutes” compared two Indiana students to students in India and China, taking particular note of how much more time the Indian and Chinese students spent on studying or completing homework.

“We’re not trying to say that all homework is bad,” Maltese said. “It’s expected that students are going to do homework. This is more of an argument that it should be quality over quantity. So in math, rather than doing the same types of problems over and over again, maybe it should involve having students analyze new types of problems or data. In science, maybe the students should write concept summaries instead of just reading a chapter and answering the questions at the end.”

This issue is particularly relevant given that the time spent on homework reported by most students translates into the equivalent of 100 to 180 50-minute class periods of extra learning time each year.

The authors conclude that given current policy initiatives to improve science, technology, engineering and math, or STEM, education, more evaluation is needed about how to use homework time more effectively. They suggest more research be done on the form and function of homework assignments.

“In today’s current educational environment, with all the activities taking up children’s time both in school and out of school, the purpose of each homework assignment must be clear and targeted,” Tai said. “With homework, more is not better.”

Media Contact

Rebecca P. Arrington

Office of University Communications

[email protected] (434) 924-7189

Article Information

November 20, 2012

/content/study-homework-doesn-t-mean-better-grades-maybe-better-standardized-test-scores

• Our Mission

Research Trends: Why Homework Should Be Balanced

Research suggests that while homework can be an effective learning tool, assigning too much can lower student performance and interfere with other important activities.

Homework: effective learning tool or waste of time?

Since the average high school student spends almost seven hours each week doing homework, it’s surprising that there’s no clear answer. Homework is generally recognized as an effective way to reinforce what students learn in class, but claims that it may cause more harm than good, especially for younger students, are common.

Here’s what the research says:

• In general, homework has substantial benefits at the high school level, with decreased benefits for middle school students and few benefits for elementary students (Cooper, 1989; Cooper et al., 2006).
• While assigning homework may have academic benefits, it can also cut into important personal and family time (Cooper et al., 2006).
• Assigning too much homework can result in poor performance (Fernández-Alonso et al., 2015).
• A student’s ability to complete homework may depend on factors that are outside their control (Cooper et al., 2006; OECD, 2014; Eren & Henderson, 2011).
• The goal shouldn’t be to eliminate homework, but to make it authentic, meaningful, and engaging (Darling-Hammond & Ifill-Lynch, 2006).

Why Homework Should Be Balanced

Homework can boost learning, but doing too much can be detrimental. The National PTA and National Education Association support the “10-minute homework rule,” which recommends 10 minutes of homework per grade level, per night (10 minutes for first grade, 20 minutes for second grade, and so on, up to two hours for 12th grade) (Cooper, 2010). A recent study found that when middle school students were assigned more than 90–100 minutes of homework per day, their math and science scores began to decline (Fernández-Alonso, Suárez-Álvarez, & Muñiz, 2015). Giving students too much homework can lead to fatigue, stress, and a loss of interest in academics—something that we all want to avoid.

Homework Pros and Cons

Homework has many benefits, ranging from higher academic performance to improved study skills and stronger school-parent connections. However, it can also result in a loss of interest in academics, fatigue, and a loss of important personal and family time.

Grade Level Makes a Difference

Although the debate about homework generally falls in the “it works” vs. “it doesn’t work” camps, research shows that grade level makes a difference. High school students generally get the biggest benefits from homework, with middle school students getting about half the benefits, and elementary school students getting few benefits (Cooper et al., 2006). Since young students are still developing study habits like concentration and self-regulation, assigning a lot of homework isn’t all that helpful.

Parents Should Be Supportive, Not Intrusive

Well-designed homework not only strengthens student learning, it also provides ways to create connections between a student’s family and school. Homework offers parents insight into what their children are learning, provides opportunities to talk with children about their learning, and helps create conversations with school communities about ways to support student learning (Walker et al., 2004).

However, parent involvement can also hurt student learning. Patall, Cooper, and Robinson (2008) found that students did worse when their parents were perceived as intrusive or controlling. Motivation plays a key role in learning, and parents can cause unintentional harm by not giving their children enough space and autonomy to do their homework.

Homework Across the Globe

OECD , the developers of the international PISA test, published a 2014 report looking at homework around the world. They found that 15-year-olds worldwide spend an average of five hours per week doing homework (the U.S. average is about six hours). Surprisingly, countries like Finland and Singapore spend less time on homework (two to three hours per week) but still have high PISA rankings. These countries, the report explains, have support systems in place that allow students to rely less on homework to succeed. If a country like the U.S. were to decrease the amount of homework assigned to high school students, test scores would likely decrease unless additional supports were added.

Homework Is About Quality, Not Quantity

Whether you’re pro- or anti-homework, keep in mind that research gives a big-picture idea of what works and what doesn’t, and a capable teacher can make almost anything work. The question isn’t  homework vs. no homework ; instead, we should be asking ourselves, “How can we transform homework so that it’s engaging and relevant and supports learning?”

Cooper, H. (1989). Synthesis of research on homework . Educational leadership, 47 (3), 85-91.

Cooper, H. (2010). Homework’s Diminishing Returns . The New York Times .

Cooper, H., Robinson, J. C., & Patall, E. A. (2006). Does homework improve academic achievement? A synthesis of research, 1987–2003 . Review of Educational Research, 76 (1), 1-62.

Darling-Hammond, L., & Ifill-Lynch, O. (2006). If They'd Only Do Their Work! Educational Leadership, 63 (5), 8-13.

Eren, O., & Henderson, D. J. (2011). Are we wasting our children's time by giving them more homework? Economics of Education Review, 30 (5), 950-961.

Fernández-Alonso, R., Suárez-Álvarez, J., & Muñiz, J. (2015, March 16). Adolescents’ Homework Performance in Mathematics and Science: Personal Factors and Teaching Practices . Journal of Educational Psychology. Advance online publication.

OECD (2014). Does Homework Perpetuate Inequities in Education? PISA in Focus , No. 46, OECD Publishing, Paris.

Patall, E. A., Cooper, H., & Robinson, J. C. (2008). Parent involvement in homework: A research synthesis . Review of Educational Research, 78 (4), 1039-1101.

Van Voorhis, F. L. (2003). Interactive homework in middle school: Effects on family involvement and science achievement . The Journal of Educational Research, 96 (6), 323-338.

Walker, J. M., Hoover-Dempsey, K. V., Whetsel, D. R., & Green, C. L. (2004). Parental involvement in homework: A review of current research and its implications for teachers, after school program staff, and parent leaders . Cambridge, MA: Harvard Family Research Project.

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.

Sign up for the Live Science daily newsletter now

Get the world’s most fascinating discoveries delivered straight to your inbox.

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. 

New cause of asthma lung damage revealed

Myth busted: Total solar eclipses don't release special, blinding radiation, NASA says

Watch live! The total solar eclipse has begun over North America.

Most Popular

By Nicoletta Lanese April 07, 2024

By Abha Jain April 07, 2024

By Jennifer Nalewicki April 07, 2024

By Jamie Carter April 06, 2024

By Melissa Hobson April 06, 2024

By Jennifer Nalewicki April 06, 2024

By Patrick Pester April 06, 2024

By Brandon Specktor April 05, 2024

By Sneha Khedkar April 05, 2024

By Ben Turner April 05, 2024

By Harry Baker April 05, 2024

• 2 James Webb telescope confirms there is something seriously wrong with our understanding of the universe
• 3 'Gambling with your life': Experts weigh in on dangers of the Wim Hof method
• 4 Cholesterol-gobbling gut bacteria could protect against heart disease
• 5 The sun is surprisingly quiet right now. What does this mean for the April 8 total solar eclipse?
• 2 Low tides reveal Bronze Age fortress that likely defended against Irish mainland
• 3 Decomposing globster washes ashore in Malaysia, drawing crowds
• 4 NASA engineers discover why Voyager 1 is sending a stream of gibberish from outside our solar system
• 5 Giant coyote killed in southern Michigan turns out to be a gray wolf — despite the species vanishing from region 100 years ago

Analyzing ‘the homework gap’ among high school students

Subscribe to the brown center on education policy newsletter, michael hansen and michael hansen senior fellow - brown center on education policy , the herman and george r. brown chair - governance studies @drmikehansen diana quintero diana quintero former senior research analyst, brown center on education policy - the brookings institution, ph.d. student - vanderbilt university @quintero05diana.

August 10, 2017

Researchers have struggled for decades to identify a causal, or even correlational, relationship between time spent in school and improved learning outcomes for students. Some studies have focused on the length of a school year while others have focused on hours in a day and others on hours in the week .

In this blog post, we will look at time spent outside of school–specifically time spent doing homework–among different racial and socio-economic groups. We will use data from the American Time Use Survey (ATUS) to shed light on those differences and then attempt to explain those gaps, using ATUS data and other evidence.

What we know about out-of-school time

Measuring the relationship between out-of-school time and outcomes like test scores can be difficult. Researchers are primarily confounded by an inability to determine what compels students to choose homework during their time off over other activities. Are those who spend more time on homework just extra motivated? Or are they struggling students who need to work harder to keep up? What role do social expectations from parents or peers play?

Previous studies have examined the impact of this outside time use on educational outcomes for students. A 2007 study using data from Berea College in Kentucky identified a causal relationship between hours spent studying and a student’s academic performance through an interesting measure. The researchers took advantage of randomly assigned college roommates, paying attention to those who came to campus with a video game console in tow. They hypothesized students randomly assigned to a roommate without a video game console would study more, since all other factors remained equal. That hypothesis held up, and that group also received significantly higher grades, demonstrating the causal relationship.

Other research has relied on data collected through the American Time Use Survey, a study of how Americans spend their time, and shown the existence of a gender gap and a parental education gap in homework time. Other studies have looked at the relationship between holding a job and student’s time use in discretionary activities , like sleep, media consumption, and time spent on homework. We are curious about out-of-school differences in homework time by race and income.

Descriptive statistics of time use

We began with a general sample of 2,575 full-time high school students between the ages of 15 and 18 from the ATUS, restricting the sample to their answers about time spent on homework during weekdays and school months (September to May). Among all high school students surveyed (those that reported completing their homework and those that did not), the time allocated to complete homework amounted to less than an hour per day, despite the fact that high school teachers report they assign an average of 3.5 hours of homework per day.

To explore racial or income-based differences, in Figure 1, we plot the minutes that students reporting spending on homework separately by their racial/ethnic group and family income. We observed a time gap between racial groups, with Asian students spending the most time on homework (nearly two hours a day). Similarly, we observe a time gap by the students’ family income.

We can also use ATUS data to isolate when students do homework by race and by income. In Figure 2, we plot the percentage of high school students in each racial and income group doing homework by the time of day. Percentages remain low during the school day and then expectedly increase when students get home, with more Asian students doing more homework and working later into the night than other racial groups. Low-income students reported doing less homework per hour than their non-low-income peers.

Initial attempts to explain the homework gap

We hypothesized that these racial and income-based time gaps could potentially be explained by other factors, like work, time spent caring for others, and parental education. We tested these hypotheses by separating groups based on particular characteristics and comparing the average number of minutes per day spent on homework amongst the comparison groups.

Students who work predictably reported spending less time on educational activities, so if working disproportionately affected particular racial or income groups, then work could help explain the time gap. Students who worked allocated on average 20 minutes less for homework than their counterparts who did not work. Though low-income students worked more hours than their peers, they largely maintained a similar level of homework time by reducing their leisure or extracurricular activities. Therefore, the time gap on homework changed only slightly with the inclusion of work as a factor.

We also incorporated time spent taking care of others in the household. Though a greater percentage of low-income students take care of other household members, we found that this does not have a statistically significant effect on homework because students reduce leisure, rather than homework, in an attempt to help their families. Therefore, this variable again does not explain the time gaps.

Finally, we considered parental education, since parents with more education have been shown to encourage their children to value school more and have the resources to ensure homework is completed more easily. Our analysis showed students with at least one parent with any post-secondary degree (associate or above) reported spending more time on homework than their counterparts whose parents do not hold a degree; however, gaps by race still existed, even holding parental education constant. Turning to income levels, we found that parental education is more correlated with homework time among low-income students, reducing the time gap between income groups to only eight minutes.

Societal explanations

Our analysis of ATUS could not fully explain this gap in time spent on homework, especially among racial groups. Instead, we believe that viewing homework as an outcome of the culture of the school and the expectations of teachers, rather than an outcome of a student’s effort, may provide some reasons for its persistence.

Many studies, including recent research , have shown that teachers perceive students of color as academically inferior to their white peers. A 2016 study by Seth Gershenson et al. showed that this expectations gap can also depend on the race of the teacher. In a country where minority students make up nearly half of all public school students, yet minority teachers comprise just 18 percent of the teacher workforce, these differences in expectations matter.

Students of color are also less likely to attend high schools that offer advanced courses (including Advanced Placement courses) that would likely assign more homework, and thus access to rigorous courses may partially explain the gaps as well.

Research shows a similar, if less well-documented, gap by income, with teachers reporting lower expectations and dimmer futures for their low-income students. Low-income students and students of color may be assigned less homework based on lower expectations for their success, thus preventing them from learning as much and creating a self-fulfilling prophecy .

In conclusion, these analyses of time use revealed a substantial gap in homework by race and by income group that could not be entirely explained by work, taking care of others, or parental education. Additionally, differences in educational achievement, especially as measured on standardized tests, have been well-documented by race and by income . These gaps deserve our attention, but we should be wary of blaming disadvantaged groups. Time use is an outcome reflecting multiple factors, not simply motivation, and a greater understanding of that should help raise expectations–and therefore, educational achievement–all around.

Sarah Novicoff contributed to this post.

Related Content

Michael Hansen, Diana Quintero

October 5, 2016

Sarah Novicoff, Matthew A. Kraft

November 15, 2022

September 10, 2015

K-12 Education

Governance Studies

Brown Center on Education Policy

Hannah C. Kistler, Shaun M. Dougherty

April 9, 2024

Katharine Meyer, Rachel M. Perera, Michael Hansen

Dominique J. Baker

LIVE@CoSN2024: Exclusive Coverage

Study: Too much homework can lower test scores

Piling on the homework doesn’t help kids do better in school. In fact, it can lower their test scores, the Huffington Post reports. 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…

Click here for the full story

Sign up for our K-12 newsletter

• Recent Posts
• ‘Buyer’s remorse’ dogging Common Core rollout - October 30, 2014
• Calif. law targets social media monitoring of students - October 2, 2014
• Elementary world language instruction - September 25, 2014

Want to share a great resource? Let us know at [email protected] .

Username or Email Address

Remember Me

" * " indicates required fields

eSchool News uses cookies to improve your experience. Visit our Privacy Policy  for more information.

Excessive screen time linked to lower student test scores

Are children getting too much screen time?

That question is getting more scrutiny in the wake of recent national standardized tests that showed a decline in reading comprehension among fourth- and eighth-graders.

In Spokane and the rest of the nation, educators have noticed.

“In some ways these devices enhance learning,” said Lisa Laurier, a professor at Whitworth University who specializes in elementary education. “But sometimes the negatives outweigh the positives.”

One study found children ages 8 to 12 are spending an average of five hours a day looking at screens that have nothing to do with their schoolwork.

Laurier said she worries about the long-term effects of heavy screen time, such as the overstimulation of young minds by flashing images.

“You end up with children who seem distracted, who lose their ability to concentrate,” said Laurier, who also worries some school districts are over-reliant on tablets because federal grants make them cheaper than printed materials.

Meanwhile, local officials say they’re working hard to strike an instructional balance.

“Our district on the whole is very mindful of how we distribute these materials,” said Scott Kerwein, director of technology and information at Spokane Public Schools.

Kerwein, who also serves as a teacher counselor, said the addition of screens allows one group of students in a given classroom to work semi-independently while a teacher works one-on-one with other students.

“We know that tech is going to be part of student life now and moving forward,” said Brian Coddington, the district’s director of communications and public relations. “We’re trying to make sure that we help teachers find ways to be selective.”

Everyone agrees on two main points: screens are here to stay and children must be guided toward a balance.

Even as the National Assessment of Educational Progress – often called “the nation’s report card” – was released late last month, independent analysis showed some troubling trends.

The nonprofit Common Sense Media’s annual census of children’s media use, released the same week as the NAEP, found that 94 percent of English/language arts teachers surveyed said they used digital programs for core curriculum activities several times a month.

Using screens for class instruction and homework comes on top of the average of five hours a day.

That too raises a question about communication between parents and teachers: Do they compare notes? And do they have time to do so?

One thing is certain, according to the NAEP data: Locally and nationally, students have lost ground since the 2017 tests on both main reading content areas: literary experience, such as fiction analysis, and reading for information, such as finding evidence to support an argument.

Both grades declined significantly in both areas from 2017 to 2019, but the drop was larger for literary skills. In fact, eighth-graders perform worse now than they did in 2009 in literary experience.

An Education Week analysis of the NAEP data showed a relationship between high-screen and digital-device use and lower proficiency on the test.

For example, students who used digital devices for reading fewer than 30 minutes a day scored on average 8 scale points higher than those who used computers in language arts for longer periods of time.

These light digital users scored 26 scale points higher than the students who spent the longest reading periods on digital devices, four hours or more a day.

To put that into context, one year of school equals roughly 12 points on the NAEP’s 500-point scale.

However, according to Laurier, there’s even more to worry about as children spend hours in front of laptops, tablets and smartphones.

“What we’re seeing,” Laurier said, “is that the brain is starting to develop behaviors that look like ADHD.”

Flashing lights, on-screen movements and the constant shifting of images may contribute to greater distractions and loss of ability to concentrate.

And while the internet and videos offer opportunities to develop background on academic materials, annotation is more difficult on a screen.

“That limits kids to some extent … and comprehension is impaired,” Laurier said.

From prenatal care to pediatrics, Providence is creating a healthier future for families

Like many expectant mothers, Miranda Kekauoha had a plan.

Low Test Scores Have Educators Worried, Survey Shows

• Share article

A majority of educators say their schools’ or districts’ standardized test results from last spring are lower than they were pre-pandemic—and that they find the numbers concerning.

Those are the findings from a recent nationally representative EdWeek Research Center survey of teachers, principals, and district administrators. The survey was administered in late October and early November, with 977 respondents.

Of survey-takers who had received their schools’ spring state test results, 70 percent said that scores were down across the board from where they were before COVID, or were down in some areas and held steady in others.

In math, 80 percent of respondents said elementary scores were concerning and 81 percent said the same of secondary scores. Numbers were similar in English/language arts, with 76 percent of educators concerned by elementary scores and 74 percent for secondary scores.

About a quarter of respondents said they hadn’t received state test results from last spring (the survey sample also included teachers who taught in untested subjects).

These results add to the growing stream of data demonstrating that students’ academic progress stalled over the 2020-21 school year, amid the pandemic’s interruptions to instruction. Just earlier this month, for example, curriculum and assessment provider Curriculum Associates released results from its reading and math diagnostic tests this fall , showing that fewer students in grades 1 through 8 are on grade level in reading and math than in years past.

But state standardized test results, specifically, come with several caveats, assessment experts have said. As Education Week’s Catherine Gewertz reported last month , disruptions to testing-as-usual during the 2020-21 school year could affect the validity of the scores.

Some states allowed students to test remotely, making it difficult to compare their results to those of students who tested in person. And many states reported lower-than-average participation rates, meaning that the results might not reflect the student population.

Even in districts where most students tested in person, some educators say that the results have limited usefulness this year.

In the past, Andrew McDaniel might have compared results at his school to others in the state, to see if he could learn from similar schools that had better scores in certain areas. But this year there are too many variables at play—how much time kids spent in buildings, or how much support they had from families at home—to glean much useful information from that kind of comparison, said McDaniel, the principal of Southwood Junior/Senior High School in Wabash, Ind.

“It’s important, but it’s not the only data point that we look at,” he said of state test scores.

Scores aren’t ‘fine-grained enough to guide instruction’

State standardized test scores only capture one moment in time, a point that critics of using them for accountability purposes have long emphasized. But this fact makes scores especially hard to interpret during the pandemic, as students’ learning environments keep shifting, McDaniel said.

For example, at Southwood Junior/Senior High School, some students were remote during the 2020-21 school year while others attended school in person. Many of those who were in person still had to leave the building for weeks at a time due to quarantining requirements. Lots of students struggled with online learning, McDaniel said.

“Our numbers for failing grades were just off the charts.” And that was reflected in the school’s state test scores, which were lower than in years’ past.

This year, though, the district isn’t offering a remote option, so all students are in the building. The district has also changed the quarantining policy, so that parents can choose to keep sending children to school if they’ve been exposed to someone who tested positive, as long as the student isn’t showing symptoms. (The Centers for Disease Control and Prevention recommends that all unvaccinated students who have been exposed should quarantine, though some schools have started to remove these requirements or put other policies in place during the 2021-22 school year.)

Students are spending a lot more time in the building this year than they did last year, and they’re already making academic progress, McDaniel said. The 2020-21 test scores, while low, aren’t his biggest concern in this new landscape. Instead, it’s behavior and social-emotional skills, as students re-learn the routines of school.

Other educators say that their students’ scores from last year reflect persisting academic needs.

Mike Huler, the secondary mathematics curriculum specialist in Westerville City Schools in Ohio, said that scores were “considerably worse in the last testing cycle” than in years’ past. He attributes the dips to a few factors. Instructional mode in the district shifted throughout the year, between hybrid and in-person learning, causing disruptions. And the spring shutdowns in 2020 pushed teachers to play catch-up with the previous year’s content at the start of the 2020-21 school year, rather than moving on to grade-level work.

“It’s very difficult to convince teachers to stay on grade-level standards and scaffold in when needed, as opposed to, ‘We didn’t cover that at the end of last year and we need to do that first,’” he said. “So there was much more backfilling than I would have liked before we even knew what [students] needed.”

Still, he doesn’t think that state assessment from last spring can provide much of a roadmap for how to support students now. “The information that we get from the state isn’t really fine-grained enough to guide instruction,” Huler said.

Instead, he’s supporting teachers in using a combination of quantitative and qualitative data at the classroom and school levels.

Math teachers are using a supplemental online learning program to diagnose and fill gaps in grade-level skills. The district has also started doing “learning rounds,” sending groups of teachers and school- and district-level administrators out to schools to observe what practices teachers are using.

These groups are looking for the kinds of practices that will set students up for success in high school, like math conversation, persistence through complex problems, and working on tasks that require reasoning and could have more than one solution.

“I’m more concerned with preparing kids for the long run,” Huler said.

Sign Up for The Savvy Principal

Edweek top school jobs.

Sign Up & Sign In

share this!

August 18, 2020

Smartphones are lowering student's grades, study finds

by Rutgers University

The ease of finding information on the internet is hurting students' long-term retention and resulting in lower grades on exams, according to a Rutgers University-New Brunswick study.

The study, published in the journal Educational Psychology , found that smartphones seem to be the culprit. Students who received higher homework but lower exam scores—a half to a full letter grade lower on exams—were more likely to get their homework answers from the internet or another source rather than coming up with the answer themselves.

"When a student does homework by looking up the answers, they usually find the correct answer, resulting in a high score on the assignment," said lead author Arnold Glass, a professor of psychology at Rutgers-New Brunswick's School of Arts and Sciences. "However, when students do that, they rapidly forget both the question and answer. Consequently, they transform homework from what has been, until now, a useful exercise into a meaningless ritual that does not help in preparing for exams."

The research also found that while 14 percent of students scored lower on exams than homework in 2008, that number jumped to 55 percent in 2017 as the use of smartphones for homework has become more common.

Glass says when students read a homework question, they should think about it, generate the answer on their own and commit to that answer.

"If the student does this first and then finds the correct answer online, the student is likely to remember the answer, which will have a significant long-term effect on subsequent exam performance," said Glass, whose goal was to determine when a student knows a particular fact, whether they remember it and can generalize it.

The study included 2,433 Rutgers-New Brunswick students in 11 different lecture courses. Over the 11-year period more than 232 different questions were created.

Working with co-author and graduate student Mengxue Kang, Glass and Kang's study is a part of an ongoing project to use technology to monitor academic performance and to assess the effects of new instructional technologies, like smartphones and the Internet, on how students perform in school.

Provided by Rutgers University

Explore further

Feedback to editors

Using CO₂ and biomass, researchers find path to more environmentally friendly recyclable plastics

7 hours ago

Precision agriculture research identifies gene that controls production of flowers and fruits in pea plants

Long-term forest study shows tornado's effects linger 25 years later

A new coating method in mRNA engineering points the way to advanced therapies

8 hours ago

ATLAS provides first measurement of the W-boson width at the LHC

9 hours ago

Smart vest turns fish into underwater spies, providing a glimpse into aquatic life like never before

Ants in Colorado are on the move due to climate change

Caterpillar 'noses' are surprisingly sophisticated, researchers find

Building footprints could help identify neighborhood sociodemographic traits

10 hours ago

Fossilized dinosaur eggshells can preserve amino acids, the building blocks of proteins, over millions of years

11 hours ago

Relevant PhysicsForums posts

Motivating high school physics students with popcorn physics.

Apr 3, 2024

How is Physics taught without Calculus?

Mar 29, 2024

Why are Physicists so informal with mathematics?

Mar 24, 2024

The changing physics curriculum in 1961

Suggestions for using math puzzles to stimulate my math students.

Mar 21, 2024

The New California Math Framework: Another Step Backwards?

Mar 14, 2024

More from STEM Educators and Teaching

Related Stories

Checking phones in lectures can cost students half a grade in exams

Jul 27, 2018

Doing homework is associated with change in students' personality

Oct 6, 2017

How expectations impact actual exam scores

Jan 25, 2018

Scholar suggests ways to craft more effective homework assignments

Oct 1, 2015

How much math, science homework is too much?

Mar 23, 2015

Study of first-time smartphone users reveals devices may be detrimental to learning process

Jul 7, 2015

Recommended for you

Earth, the sun and a bike wheel: Why your high-school textbook was wrong about the shape of Earth's orbit

Apr 8, 2024

Touchibo, a robot that fosters inclusion in education through touch

Apr 5, 2024

More than money, family and community bonds prep teens for college success: Study

Research reveals significant effects of onscreen instructors during video classes in aiding student learning

Mar 25, 2024

Prestigious journals make it hard for scientists who don't speak English to get published, study finds

Mar 23, 2024

Using Twitter/X to promote research findings found to have little impact on number of citations

Mar 22, 2024

Let us know if there is a problem with our content

Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page. For general inquiries, please use our contact form . For general feedback, use the public comments section below (please adhere to guidelines ).

Please select the most appropriate category to facilitate processing of your request

Thank you for taking time to provide your feedback to the editors.

Your feedback is important to us. However, we do not guarantee individual replies due to the high volume of messages.

E-mail the story

Your email address is used only to let the recipient know who sent the email. Neither your address nor the recipient's address will be used for any other purpose. The information you enter will appear in your e-mail message and is not retained by Phys.org in any form.

Newsletter sign up

Get weekly and/or daily updates delivered to your inbox. You can unsubscribe at any time and we'll never share your details to third parties.

More information Privacy policy

Donate and enjoy an ad-free experience

We keep our content available to everyone. Consider supporting Science X's mission by getting a premium account.

E-mail newsletter