Why sleep might be the most important part of your child's revision

When exams are approaching, it is easy for everything to become about revision. Your child has another chapter to get through. Another set of questions to practise. Another topic they haven't quite mastered. And when time starts to run out, one of the first things that can get sacrificed is sleep. It seems logical. If your child has another hour available, surely using it to revise is better than going to bed?

Actually, that extra hour might not be helping as much as you think. Sleep isn't time away from learning. Sleep is part of learning.

Your child's brain doesn't switch off when they go to sleep

We often think of learning as something that happens when a child is sitting at a desk, reading a book or answering questions. But the brain continues to process what has been learned after the studying has finished. One of the important jobs sleep does is help the brain consolidate memories. In simple terms, the information your child has been working with during the day gets processed and strengthened while they sleep. That doesn't mean your child can learn an entire history course while they're asleep. Sadly, there is no magic revision playlist you can put on at bedtime. But it does mean that the sleep your child gets after learning is part of the process of turning that learning into something they can remember later.

Why staying up late can be counterproductive

Imagine your child has spent an hour revising biology and then decides to stay up for another two hours because there is still more to cover. They are tired, but they keep going. The problem is that learning depends on attention and thinking. As your child becomes more tired, it becomes harder to concentrate, process information and retrieve what they already know. They might spend those extra two hours looking at their notes, but that doesn't necessarily mean they are learning effectively. And if staying up late means they are exhausted the following morning, they may also be starting the next day with less attention, poorer concentration and a brain that isn't working at its best.

Sometimes another hour of sleep is more valuable than another hour of revision.

It isn't just about exams

This is important because sleep shouldn't become something parents only think about when exams are approaching. Your child is learning all the time. They're learning new vocabulary, new mathematical processes, new scientific ideas, new skills and new information about the world around them. Good sleep supports the attention and memory they need to learn effectively in the first place. That means sleep is not simply an exam strategy. It is one of the everyday conditions that helps the brain learn.

A regular routine can help

Children's sleep patterns can vary enormously, particularly as they get older. Homework, social activities, sport, screens and simply wanting to stay up later can all make it harder to establish a consistent routine. You don't need to create a military-style bedtime schedule, but having some consistency can help. Going to bed and getting up at roughly similar times gives your child a predictable routine and helps their body know when it is time to sleep and when it is time to wake up.

The key is to establish those habits before the important exams arrive. Trying to completely change your child's sleep routine the night before an exam is unlikely to be particularly helpful. As we discussed in our article about the night before an exam, the aim at that point is to prepare calmly rather than suddenly overhaul everything.

Give the brain a chance to wind down

Going directly from a high-energy activity to trying to fall asleep isn't always easy. Your child might have been studying, playing a game, scrolling through social media or messaging friends right up until bedtime. Suddenly telling them to put everything away and go straight to sleep isn't necessarily going to work. A short period of winding down can help. That might mean reading, listening to music, having a shower or simply doing something quiet that signals that the day is coming to an end. The exact routine will be different for every child.

The important thing is creating a transition between being awake and active and being ready to sleep.

What about phones and screens?

This is one of those areas where parents can easily end up in an argument about technology. You don't necessarily need to make the conversation about banning phones altogether. Instead, think about what your child's phone is doing to their bedtime routine. If they're lying in bed watching videos, replying to messages and scrolling through social media, the problem isn't simply that they are looking at a screen. They're also staying mentally engaged when their brain should be winding down.

A useful family rule might be that phones are charged somewhere away from the bed, giving your child a clear separation between their phone and their sleep. The exact rule will depend on your child and your family. But if the phone is regularly keeping them awake, it is worth doing something about it.

Don't turn sleep into another thing to worry about

There is an irony here. You can tell your child repeatedly that they must get eight hours of sleep before an exam, and suddenly sleep becomes another thing they are anxious about. "What if I can't get to sleep?", "What if I only get six hours?", "What if I'm exhausted tomorrow?" That anxiety can make falling asleep even harder.

So try not to make one particular night seem like it will determine everything. A single poor night's sleep is not going to erase everything your child has learned, just as one excellent night's sleep isn't going to make up for weeks of not studying. What matters much more is the pattern. Good sleep habits built over time are far more useful than trying to manufacture perfect sleep the night before an exam.

Parents don't need to become sleep experts

You don't need to understand the science of sleep in detail to help your child. You can start with some fairly simple questions. Are they getting enough sleep most nights? Do they have a reasonably consistent routine? Are they regularly staying up very late to finish work? Is their phone keeping them awake? Do they have enough time to wind down before bed? If the answer to those questions suggests that sleep is regularly being sacrificed for studying, it might be worth having a conversation about whether that extra revision is actually helping. Sometimes the best way to support your child's learning is not to find another revision technique. It is to make sure they have the conditions that allow the techniques they are already using to work.

Sleep is part of the learning process

It is easy to think of sleep as something that happens after learning has finished, but it is actually part of the learning process itself. When your child pays attention, thinks hard, retrieves information and practises what they are learning, they are creating the memories they will need later. Sleep then gives the brain an opportunity to process and consolidate some of that learning, helping those memories become more secure.

So when your child goes to bed after a good study session, they aren't simply pressing pause until tomorrow. Their brain is still doing some of the work.

So the next time your child says they need to stay up for another hour because they haven't finished revising, don't automatically assume that more study must be better. Ask yourself what they are likely to get from that extra hour. If they're still alert and working effectively, perhaps it is useful. But if they're exhausted, staring at the same page and struggling to concentrate, they may be better off putting the books away.

Sometimes the most productive thing your child can do for tomorrow's learning is go to bed tonight.