how does homework help you study

The Case for Homework

Posted September 29, 2016
By Matt Weber

This fall, the start of the new school year seemingly brought with it a trend of teachers forgoing homework assignments in order to allow their students more time outside of school for family and play. A number of these announcements took off on social media, with many parents supporting the stance and wishing that their own child's teacher would follow suit. While few would dispute the importance of family and play time for young children, it may be shortsighted to believe that eliminating homework altogether is the answer.

"All children should be doing homework," says Duke University Professor Harris M. Cooper , who has researched and wrote on the topic for over 25 years. While Cooper acknowledges that an excess of homework is both unnecessary and potentially detrimental, the upside of homework is too great to ignore. Not only is it important in reinforcing skills learned during the school day, it also teaches time management, study skills, and independent learning, as well as keeps parents connected to their children's learning.

"Really good homework assignments" in subjects such as math and science, says Cooper, also highlight skills children use in other areas of their life — in sports, games, and everyday tasks like grocery shopping with their parents. "A really good teacher is one that takes the skills that [their students] are learning in the abstract — or more abstract — in their classroom, and uses homework to show them these are the skills they need to enjoy things they do even more," says Cooper.

In this edition of the Harvard EdCast, Cooper evaluates the dissatisfaction with homework practices and discusses all of the reasons why, for children, homework is essential.

About the Harvard EdCast

The Harvard EdCast is a weekly series of podcasts, available on the Harvard University iTunes U page, that features a 15-20 minute conversation with thought leaders in the field of education from across the country and around the world. Hosted by Matt Weber, the Harvard EdCast is a space for educational discourse and openness, focusing on the myriad issues and current events related to the field.

An education podcast that keeps the focus simple: what makes a difference for learners, educators, parents, and communities

Roots of the School Gardening Movement

Student-centered learning.

Relationships and Learning

Does Homework Improve Academic Achievement?

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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.