Lekto
If you want to know how to revise effectively, the short answer is: test yourself instead of rereading, spread your sessions over several days, and mix different types of questions. These three habits are well supported by learning research and work for almost any subject. Below you will find how to use them in a normal school week.
Why rereading and highlighting are not enough
Rereading your notes makes the material feel familiar, and familiarity is easy to confuse with knowing it. In an exam, though, nobody shows you the answer to recognise. You have to pull it out of memory on your own.
Highlighting and copying notes out neatly have the same problem. They feel like hard work, but your brain is never asked to produce anything. That is why some students who "revised all evening" do worse than classmates who spent less time but worked actively.
The good news is that better methods do not take more time. They just use the same time differently.
- rereading: feels productive, leaves little behind,
- highlighting: useful only to mark what you will later test yourself on,
- rewriting notes: fine for organising, weak for remembering,
- watching videos: helpful to understand, not to memorise.
Straight after each lesson, write down three things you remember from it. It takes a minute and counts as your first retrieval session before the material starts to fade.
How to revise with retrieval practice
Retrieval practice means testing yourself. Read a section once, close the book, and write down or say everything you remember. Then check your notes and fill the gaps. Those gaps are exactly what to focus on next time.
You can do this in many ways. Flashcards with a question on one side. A blank sheet where you draw a mind map of the topic from memory. Past-paper questions answered without looking at the worked examples. Explaining the topic out loud to someone who does not know it.
Retrieval feels harder than rereading, and that effort is the point. Getting an answer wrong and then correcting it is one of the most reliable ways to remember it.
- flashcards: dates, vocabulary, definitions, equations,
- blank-page recall: history, biology, geography, English literature,
- practice questions without notes: maths, physics, chemistry,
- teaching someone else: quickly shows what you do not understand.
How to revise a topic in 5 steps
- Read once, carefullyGo through the section once and mark only the parts you do not understand.
- Test yourselfClose the book and write down everything you can remember, then compare with your notes.
- Fix the gapsTurn whatever you missed into flashcards or questions.
- Schedule two reviewsPlan a second session in two or three days and a final one the day before the test.
- SleepDo your last review in the evening, then go to bed instead of cramming.
Space your revision over days and weeks
Memory fades quickly after you first learn something, and each review after a gap makes it last longer. That is why three 20-minute sessions on different days usually beat one hour in a single evening.
For a test announced a week ahead, a simple pattern works well: a first session on the day it is announced, a second two or three days later, and a final one the day before. Begin every session with retrieval, not reading.
For bigger exams, the same idea scales up into a revision timetable of short, spaced sessions over several weeks. Spacing only works if you know the dates early, so record every test as soon as it is announced.
Mix topics instead of practising one at a time
If you do ten questions of the same type in a row, by the third one you are on autopilot. Real exams mix question types, so part of the challenge is recognising which method to use.
When you revise, interleave: one algebra question, one on graphs, one on geometry. It feels slower and you will make more mistakes at first. That is a good sign – you are practising exactly the skill the exam tests.
The same applies across subjects. Two shorter blocks on different subjects often work better than one long block on a single topic.
How to revise in a normal school week
Methods only help if they have a place in your week. Look at your timetable and find the light and heavy days. On long days, keep revision short: homework due tomorrow plus 15 minutes of flashcards. Save longer sessions for days that finish earlier.
Here is an example for a student in their exam year. Adapt it to your own subjects and commitments. If your school uses a week A / week B timetable, make one version for each week.
- Monday: homework + 15 minutes of vocabulary flashcards,
- Tuesday: homework + first session on the newly announced test,
- Wednesday (short day): 2 × 30 minutes of mixed practice questions,
- Thursday: homework + second session on the test, from memory,
- Friday: light day, only what is due on Monday,
- Weekend: one past paper, then plan next week.
Sleep, breaks and your phone
Sleep is part of revision, not time away from it. Staying up late before an exam usually costs more than it adds, because a tired brain struggles to recall even what it knew well.
Work in blocks of 25–45 minutes with a short break where you stand up and move. Put your phone out of reach or silence notifications during a block.
Your phone can also help if it only shows what matters. Lekto lets you pin tests to the lesson they happen in and reminds you 1, 2 or 3 days or a week before. Reminders stay silent during lessons, and nothing needs an account.
How to revise: common questions
How long should a revision session be?
Most students focus well for 25 to 45 minutes before needing a short break. Several shorter sessions spread across the week usually work better than one long one.
Is it better to revise in the morning or at night?
There is no single best time. Revise at a regular time that does not cut into your sleep, and do the hardest work when you usually have the most energy.
How do I revise when I have no motivation?
Make the first step tiny: five flashcards or one practice question. Starting is often the hardest part, and once you begin, it is easier to continue for a full session.
Do I need to make notes to revise?
Not always. Notes help to organise a topic, but most of your time should go into testing yourself on it with questions, flashcards or blank-page recall.