How Long Should Homework Take Each Night?

Homework time by grade

The 10-minute rule comes from education researcher Harris Cooper's reviews of homework studies and is endorsed by the US National Education Association and the National PTA. It is a guideline for total homework across all subjects on a school night, not a rule schools must follow.

In the UK and elsewhere, Year 2 corresponds roughly to US Grade 1, so subtract one from the UK year group to read the table.

What the research says about more homework

For primary school children, studies find little link between the amount of homework and achievement. Short, regular practice, especially reading, helps; long evenings of worksheets do not obviously help and can put children off learning.

In middle and high school, homework is more clearly linked to achievement, but the benefit levels off. Beyond about 90 minutes to two hours a night for older teenagers, extra homework is associated with more stress, less sleep and little academic gain. If your child is regularly doing far more than the chart suggests, it is worth a calm conversation with the teacher. Sometimes a child is spending an hour on a task meant to take 20 minutes, and the teacher needs to know.

Why a timer helps

Homework battles are often not about the work but about time. To a child, homework with no end feels endless. A visible timer changes that. It gives the session a clear finish, turns "how much longer?" into something they can see, and lets you step back from being the one who says "keep going".

For younger children, the visual timer shows a coloured disc that empties as time runs out, with a no-numbers mode for children who cannot read a clock yet. Older students can use the 30-minute timer or the Pomodoro timer, which builds in short breaks automatically.

A simple timed homework routine

• Snack and a short break after school, about 15 to 30 minutes, before starting.
• Same place, same time every day: a clear table, good light, phone in another room.
• Look at all the tasks first and decide the order. Hardest first works for most children.
• Set the timer for one block: 10 to 15 minutes for younger children, 20 to 25 for older ones.
• Short break when it rings: 3 to 5 minutes, moving around, not on a screen.
• Repeat until the work is done or the total for their grade is reached.

If the time is up and the work is not done, stop, write a short note to the teacher saying how long your child worked, and let them go. That information is more useful to a teacher than a finished worksheet done in tears.

Children with ADHD or learning differences

Shorter blocks with more frequent breaks work better: 10 minutes on and 3 off is a good starting point. Visual timers are especially helpful because they make time concrete. Many families find that a "work, then a short reward" pattern keeps sessions positive. Our article on Pomodoro for ADHD goes deeper, and the classroom brain breaks ideas work just as well at the kitchen table.

Homework time by subject in secondary school

In middle and high school, homework is usually set per subject, which makes the total hard to see. A simple approach is to write down each night's tasks with a rough time estimate before starting, then compare the total with the guideline for the grade.

If a subject regularly takes far longer than expected, look at why. Is your child stuck on the method, distracted, or perfecting work that is already good enough? Timing each task for a week with a stopwatch gives you facts to bring to a teacher or tutor, which is far more useful than "it takes ages".

Long assignments such as projects and essays are best split into short, timed sessions across several nights. Three 25-minute sessions on a Pomodoro timer are easier to start and produce better work than one panicked evening.

Signs homework is taking too long

• Your child regularly works well past the guideline for their grade.
• Bedtime is being pushed later on school nights to finish work.
• There are frequent tears, refusals or arguments about starting.
• Your child spends a long time on a task without making progress.
• There is no time left for play, sport, family or reading.

Any of these is worth raising with the school. Teachers often do not know how long their homework takes at home, and many will adjust once they do.

Reading counts

For younger children especially, 15 to 20 minutes of reading each day, alone or together, is one of the most valuable forms of homework there is. If the homework load is light, filling the rest of the time with reading is a better use of it than extra worksheets. For more family routines that use timers, see our guide to how long kids should brush their teeth.

Frequently asked questions

Related guides

• How Long Should Kids Brush Their Teeth?
• How to Teach Kids to Tell Time on an Analog Clock
• The 52/17 Rule: 52 Minutes On, 17 Minutes Off

See all guides.