How much daily practice is enough? What learning research says

Parents tend to worry in one of two directions. Either a child isn’t practising enough and will forget everything by the exam, or a child is practising so much that the subject has turned into a chore. Both worries are reasonable, and both have the same answer: how practice is spread out matters more than how much is done in one sitting.

Learning research does not give a magic number of minutes. It does tell us quite a lot about what kind of practice works, and that points clearly towards short, regular sessions with a natural stopping point. Here is what the research broadly says, in plain words, and how to turn it into a daily routine.

What the research says

Little and often beats all at once

More than a century ago, the psychologist Hermann Ebbinghaus measured how quickly he forgot lists he had memorised, and noticed that spreading his study over several days helped him keep them better than cramming it into one sitting. Researchers have tested this idea, called the spacing effect, many times since, with all sorts of material and learners of all ages. The finding is one of the sturdiest in the psychology of learning: the same total time, spread across several days, usually leads to better long-term memory than one long session.

Cramming can feel productive, because the material is fresh in the moment. It just fades faster.

Pulling it out beats putting it in again

Rereading notes feels like learning, but much of it is recognition: “yes, I’ve seen this”. Trying to recall an answer from memory, before looking, is a different and harder kind of work, and it strengthens memory more. This is called retrieval practice, or the testing effect. Researchers such as Henry Roediger and Jeffrey Karpicke have shown it in many classroom and laboratory studies.

The useful point for parents: low-stakes questions are not just a way of checking learning. Answering them is part of the learning.

Mixing topics helps you choose the method

When all the questions in a set are the same type, a child can use the same method without thinking about why. Mixing types, sometimes called interleaving, forces the step that exams test: looking at a question and working out which idea it needs. Mixed practice often feels harder and messier, and studies suggest it tends to help longer-term learning, especially in maths.

Some struggle is good; too much is not

The researcher Robert Bjork coined the phrase desirable difficulties for this: practice that makes you work a little, such as recalling, spacing and mixing, tends to stick better than practice that feels smooth. The key word is desirable. A question a child has no way into is not a desirable difficulty; it is just discouraging. The sweet spot is effortful but possible.

Quick feedback and good sleep

Two more well-established points. Finding out quickly whether an answer was right, and why, helps a child fix a mistake before it settles in. And sleep has a real part in consolidating what was learned during the day. A late-night session that costs an hour of sleep may cost more than it gains.

The limits of the research

Most of these findings come from studies of particular kinds of material, such as word lists, facts and maths problems, over periods of days or weeks. They are strong on the general shape of good practice. They are weak on exact numbers for a particular child, and no study can tell you that your Class 6 child needs precisely 22 minutes. Treat the ideas as reliable and any specific figure as a starting point.

So how much is enough?

Here are rules of thumb, not research findings, for focused practice beyond school homework:

• Ages 6 to 8: around 10 to 15 minutes, ideally with an adult nearby.
• Ages 9 to 11: around 15 to 20 minutes.
• Ages 12 to 14: around 20 to 30 minutes.
• Ages 15 to 17: 30 minutes or more can make sense, especially before exams, but split into shorter blocks.

What matters more than the exact figure is that it happens on most days, that it involves recalling and not rereading, and that it ends before attention runs out.

Why a daily ceiling helps

It sounds odd to put a limit on practice. But a sensible ceiling does several useful things.

• Attention fades within a session. After a while, a child starts guessing, rushing or repeating the same mistake. Extra questions at that point mostly practise carelessness.
• Spacing makes tomorrow’s session worth more. Thanks to the spacing effect, a question answered tomorrow usually does more for memory than the fortieth question answered tonight.
• It protects everything else. Sleep, sport, reading for pleasure and time with friends all matter for learning and wellbeing, and an open-ended practice session quietly eats into them.
• It keeps the subject enjoyable. Stopping while a child still has some energy makes it easier to start again the next day.

This is why Ado caps subject practice at 30 questions a day by design, alongside the 8-question daily quiz. The cap is not there because 30 is a magic number. It is there so practice stays short, ends at a natural point and comes back tomorrow, which is how spaced practice works.

Signs the balance is off

Possibly too much:

• answers get faster but less accurate as a session goes on,
• tears, arguments or stalling before practice starts,
• sleep is being cut to fit it in,
• the child says they “hate” a subject they used to like.

Possibly too little:

• basics are forgotten after a holiday,
• every test brings a last-minute panic,
• the child can follow a worked example but can’t start a question alone.

A simple daily routine

1. Two minutes of recall. Before opening a book, ask: what did we cover yesterday? Write down whatever comes to mind.
2. Ten to twenty minutes of mixed questions. A few from this week, a few from earlier topics.
3. Look at the mistakes. For each wrong answer, find out why. Redo one of them without looking.
4. Stop while it’s going well. End on a question your child gets right.

Once a week, a slightly longer session can revisit older topics, which is spacing at work.

Before an exam or olympiad

Keep the habit rather than replacing it with a marathon. In the last two or three weeks, add one or two timed past papers to get used to the clock, and use the daily sessions to work on what those papers reveal. The night before, a light review and a full night’s sleep usually beat a late session. Our 12-week olympiad prep plan shows how this fits together over a term.

What parents can do

• Fix a time. The same slot each day, after a snack or before dinner, makes practice a habit, not a negotiation.
• Ask about mistakes, not marks. “Which one tripped you up today, and why?” is a better question than “how many did you get?”
• Notice the strategy. Praise checking an answer, trying a second method, or going back to a wrong question.
• Protect the stopping point. When the session is done, it’s done, even on a good day.

Regular, short practice rarely looks impressive on any single day. Over a term, it is what makes the difference.