From the blog
Before a child can grasp long division or write a good story, their brain needs the right physical conditions. Three biological pillars, sleep, movement, and food, govern how well any child can learn.
When parents ask how to help their child do better at school, they often expect a specific phonics app, a set of maths flashcards, or a stricter homework routine. Those tools have their place, but years of classroom experience, backed by a good amount of neuroscience, point to something simpler: a child's readiness to learn is physically rooted.
Before a child can grasp long division or write a descriptive story, their brain needs the right physiological conditions. A pupil who arrives at school sleep-deprived, under-active, or crashing from a sugary breakfast will struggle to benefit from even excellent teaching. Three biological pillars govern how well children learn: sleep, physical activity, and nutrition.
It's tempting to think of sleep as simple downtime, but a child's brain is intensely active while they sleep. During the day, classroom experiences are gathered in short-term storage. During deep night-time sleep, the brain reactivates that information, transfers it into longer-term storage, and prunes away what isn't needed, leaving learning anchored and the brain ready for the next day.
When children don't get enough sleep, it's the prefrontal cortex, the area responsible for working memory, focus, and emotional self-control, that takes the biggest hit. A widely cited 2016 consensus statement led by Dr Shalini Paruthi for the American Academy of Sleep Medicine, published in the Journal of Clinical Sleep Medicine, confirms that insufficient sleep directly impairs attention, academic attainment, and wellbeing. Sleep researchers including Dr Mary Carskadon and Dr Leila Tarokh have also shown that inadequate sleep in children is linked to raised cortisol, the stress hormone, which can leave children more impulsive and easily overwhelmed in the classroom.
The same consensus statement gives clear age-based targets: children aged 3 to 5 need 10 to 13 hours a day including naps, and children aged 6 to 12 need 9 to 12 hours of uninterrupted night-time sleep.
Teacher tip: a calm, screen-free wind-down for 60 minutes before bed makes a real difference. Blue light from tablets and TVs tricks the brain into thinking it's still daytime, delaying the release of melatonin, the sleep hormone.
Physical play can feel like an afterthought in a busy week, but exercise is one of the more reliable learning boosters there is. Aerobic activity gets fresh oxygen to the brain and triggers the release of a protein called BDNF (brain-derived neurotrophic factor), sometimes nicknamed "fertiliser for the brain" because it supports the growth of new brain cells and the connections between them. Research led by Dr Charles Hillman and colleagues, published in the journal Brain Research, found that children who were more physically fit had larger hippocampal volumes, the brain region most closely tied to memory.
Short bursts of activity help too. Studies on brief bouts of moderate aerobic exercise, a brisk walk, a run, a game of tag, show a measurable improvement in children's attention and concentration straight afterwards. And a major systematic review by Donnelly and colleagues in Medicine & Science in Sports & Exercise found a consistent link between regular physical activity, brain structure, and stronger reading and maths scores. UK and World Health Organization guidelines recommend at least 60 minutes of moderate-to-vigorous activity a day, plus strengthening activities like climbing or jumping a few times a week.
Teacher tip: if a child is stuck on homework, don't push through another hour at the desk. Ten or fifteen minutes on a trampoline or kicking a ball outside often does more for the next hour of focus than powering on.
A child's brain uses a striking share of their daily energy, and what they eat shapes blood sugar stability, mood, and their capacity to concentrate. A well-known 2008 review by Dr Fernando Gómez-Pinilla in Nature Reviews Neuroscience lays out how specific nutrients directly influence the brain's ability to grow and adapt, and other population research has found a consistent link between overall diet quality and school performance.
Teacher tip: a refillable water bottle every day and one omega-3 source a week go a long way.
Before investing in extra workbooks or apps, it's worth making sure these basics are covered. Children aged 6 to 12 need 9 to 12 hours of sleep a night, at least 60 minutes of movement a day, and steady, nutrient-dense meals with plenty of water. None of this replaces good teaching, but without it, even the best teaching struggles to stick.
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