A child spends three hours “revising” – book open, highlighter in hand, the same paragraph read four times over – and still stumbles through the exam a week later. Every parent has watched this scene with quiet confusion. The child worked hard. Why did nothing stick?
Cognitive psychology has a clear answer: how a child studies matters more than how long they study. Decades of research on memory point to a handful of revision techniques that genuinely improve recall and a few popular habits that quietly waste effort. Here is what the evidence actually says and what families can do with it at home.
Why Re-reading and Highlighting Feel Productive but Rarely Work?
In a landmark 2013 review published in Psychological Science in the Public Interest, cognitive scientists John Dunlosky, Katherine Rawson and colleagues assessed ten common study methods. Re-reading and highlighting – the two techniques students reach for most – were rated low utility. They create a comforting sense of familiarity with the text without building the retrieval strength needed on exam day. Recognising a sentence is not the same as recalling it.
1. Active Recall Beats Passive Review
The strategy Dunlosky’s team rated most effective is practice testing, also known as active recall or retrieval practice. In influential experiments at Washington University in St. Louis, psychologists Henry Roediger and Jeffrey Karpicke found that students who closed their books and tried to recall material remembered significantly more a week later than those who simply reread it – even though the re-readers felt more confident at the time.
At home, this can be as simple as closing the textbook and asking a child to explain a chapter aloud, or using blank-page recall: writing down everything remembered before checking the notes.
2. Spaced Repitition Fights the Forgetting Curve
The German psychologist Hermann Ebbinghaus first mapped the “forgetting curve” in the 1880s, showing how quickly new information fades without review. A large 2006 meta-analysis by Nicholas Cepeda and colleagues, published in Psychological Bulletin, found that when the same total study time is divided across several shorter revision sessions, learning is retained for longer than when that time is spent in one prolonged cramming session. In other words, revisiting a topic at spaced intervals gives the brain repeated opportunities to retrieve and consolidate the information, making it easier to recall later.
A practical approach is a simple revision calendar: revisiting a topic after one day, then three days, then a week, rather than saving every chapter for the night before a test.
3. Interleaving: Mixing Topics On Purpose
Alternating between related topics or question types – rather than mastering one before moving to the next – is called interleaving. Research by psychologist Doug Rohrer and colleagues on mathematics learning found that interleaved practice improved students’ ability to choose the correct method for a problem, a skill blocked practice does not build. Families can encourage students to vary subjects or different types of problems within a single revision session instead of repeatedly practising the same type of problem.
4. Sleep Is Part of Studying, Not a Break From It
Alternating between related topics or question types, rather than completing all the questions on one topic or practising one question type repeatedly before moving to another, is called interleaving. For example, instead of solving 10 consecutive quadratic-equation problems, a student might practise a quadratic equation, followed by a trigonometry problem, then a linear equation and another quadratic problem. Research by psychologist Doug Rohrer and colleagues on mathematics learning found that interleaved practice improved students’ ability to choose the correct method for a problem, a skill that blocked practice does not build. Families can encourage students to vary subjects or different types of problems within a single revision session instead of repeatedly practising the same type of problem.
A Common Misconception Worth Addressing
Many parents assume a child who studies quietly for long stretches is learning well. Dunlosky’s research suggests the opposite may be closer to the truth: techniques that feel slightly effortful – self-testing, spacing, mixing topics work precisely because they demand more from memory.
How Narayana Schools Builds These Habits Into the Classroom?
These findings shape Narayana Schools’ own pedagogy. Regular formative assessments and structured practice tests, built into programmes from eChamps (Classes 1-5) to Senior Secondary (Classes 11-12), are designed around retrieval practice rather than one-off exams. Term planning is deliberately spread throughout the academic year rather than being concentrated in the period leading up to board exams, reflecting the recommendations of Cepeda’s research.
Confidence in an exam hall is built quietly, over months, through the right kind of practice at home and in the classroom. Helping a child study smarter – not just longer – is one of the most lasting gifts a family can give, because at Narayana Schools, your dreams are our dreams.
FAQs
Which revision method actually works best?
Testing yourself is better than reading notes again and again. Trying to remember something without looking at the book helps it stick far better than just re-reading it.
How often should a child go over the same topic?
Brief and frequent. Revisiting a topic briefly the next day, again a few days later, then once more after a week, helps the brain hold onto it far longer than one big push at the last minute.
Does sleeping less before an exam really hurt memory?
Yes, it does. Studies show that when someone doesn’t get enough sleep, their brain struggles to retain what they’ve learned. A good night’s sleep before an exam matters more than an extra hour of studying.
Is underlining or highlighting notes a bad habit?
It’s not harmful, but it doesn’t help much either. It makes the material feel familiar, but familiar isn’t the same as remembered. Testing yourself works far better.
What can parents do at home to help, without taking over the studying?
Simple things go a long way-asking the child to explain what they studied in their own words, keeping a fixed study timetable instead of last-minute cramming, and making sure bedtime stays consistent during exam time.