Skip to main content

The context you need, when you need it

When news breaks, you need to understand what actually matters — and what to do about it. At Vox, our mission to help you make sense of the world has never been more vital. But we can’t do it on our own.

We rely on readers like you to fund our journalism. Will you support our work and become a Vox Member today?

Join now

The amount of homework kids should have every day, according to science

Christophe Haubursin
Christophe Haubursin was a senior producer for the Vox video team. Since joining the team in 2016, he has produced for Vox’s YouTube channel and Emmy-nominated shows Glad You Asked and Explained.

Spanish researchers think they’ve found the optimal amount of daily math and science homework time for adolescents: just about one hour.

A team at the University of Oviedo in Spain asked a group of 7,725 public, state-funded, and private-school students how often they did homework, how much effort they spent on various subjects, and how frequently they received help from others. Students were then evaluated with a standardized math and science test.

The report — which appeared in in the American Psychological Association’s Journal of Educational Psychology earlier this month — found that 60 to 70 minutes is the sweet spot for daily math and science homework for most students. Students who spent about an hour studying scored the highest on the test afterward.

Homework chart

After 100 minutes, their scores started to decline.

According to Javier Suarez-Alvarez, the co-lead researcher on the study, regular homework assignments and minimal parental involvement accounted for the highest test scores. The most effective students had strong independent work habits and were able to engage in “self-regulated learning.”

Still, there are some caveats to the study: because students were only tested once, the study proves correlation but not necessarily causation. The survey also didn’t differentiate between math and science results.

Suarez-Alvarez said the study results raise questions about how “academic intelligence, self-concept, and self-esteem” influence performance, too.

“The conclusion is that when it comes to homework, how is more important than how much,” Suarez-Alvarez said. “Once individual effort and autonomous working is considered, the time spent becomes irrelevant.”

See More:

More in Politics

Politics
The real reason Americans hate the economy so muchThe real reason Americans hate the economy so much
Politics

Did decades of low inflation make the public far more unforgiving when it finally did surge?

By Andrew Prokop
Podcasts
The Supreme Court abortion pills case, explainedThe Supreme Court abortion pills case, explained
Podcast
Podcasts

How Louisiana brought mifepristone back to SCOTUS.

By Peter Balonon-Rosen and Sean Rameswaram
Politics
Trump’s China policy is nearly the exact opposite of what everyone expectedTrump’s China policy is nearly the exact opposite of what everyone expected
Politics

As Trump heads to China, attention and resources are being shifted from Asia to yet another war in the Middle East.

By Joshua Keating
Politics
Are far-right politics just the new normal?Are far-right politics just the new normal?
Politics

Liberals are preparing for a longer war with right-wing populists than they once expected.

By Zack Beauchamp
The Logoff
Flavored vapes doomed Trump’s FDA headFlavored vapes doomed Trump’s FDA head
The Logoff

Why Marty Makary is out at the FDA, briefly explained.

By Cameron Peters
Politics
Virginia Democrats’ irresponsible new plan to save their gerrymanderVirginia Democrats’ irresponsible new plan to save their gerrymander
Politics

Democrats just handed the Supreme Court’s Republicans a loaded weapon.

By Ian Millhiser