George Lucas Educational Foundation
Student Engagement

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.

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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.