What if I have not started and the exam is soon?

Triage. List every topic, mark each one red, amber or green based on what you know, and spend the remaining time only on red and amber topics. Protect sleep, because a tired brain recalls far less.

Revision

How to revise for exams: a plan that actually works

Q: How far in advance should I start revising?

Start two to three weeks before the exam for most subjects. That gives you enough sessions to cover the material and enough gaps to revisit it, which is what makes revision stick rather than fade.

Q: How many hours a day should I revise?

Quality beats quantity. Three focused hours of active recall with real breaks is worth more than eight hours of re-reading notes, and the evidence on spaced practice is consistent about that.

Q: Is rereading notes a waste of time?

It is close to it. Rereading creates a feeling of familiarity that students mistake for knowledge. Testing yourself from memory produces the durable memory that actually earns the marks.

Q: Should I revise with friends?

Yes for explaining, no for silent reading. Quiz each other and talk through problems, because explaining a topic out loud exposes gaps quickly. Studying side by side in silence is just two people rereading.

Q: How do I stop procrastinating revision?

Make the first step tiny and physical: open the document, write the title, answer one question. Start with twenty-five minutes and a timer, then stop if you want. The hardest part is beginning, not continuing.

Most students do not fail because they revised too little. They fail because they revised the wrong things, in the wrong order, in a way that felt productive and was not. Here is what the evidence supports, and how to run it.

Before anything else: what "revising" actually means

Revising is not the same as going over material. It is the process of making information retrievable from memory under pressure. Reading your notes again, highlighting in colour, and rewriting summaries all feel like revision, and all of them are weak substitutes for it, because they all rely on the material being in front of you.

The shift is simple to state and hard to do: revise by testing, not by looking. Put the material away, ask yourself the question, write what you remember, then check. The gap between what you produced and what the notes said is where your revision should go.

The rule: if your eyes are on the notes, you are probably not revising. Close them.

Build your triage list in the first 30 minutes

Before revising anything, you need an honest picture of where you stand. Take every topic on the syllabus and test yourself briefly on each one, from memory, with a blank page. Not a full practice paper: a quick check per topic.

Then sort each topic into one of three groups:

Group	What it means	What to do
Red	You cannot explain it, or you get it wrong	Learn it properly. This is where most of your marks are.
Amber	You understand it but forget it under pressure	Test it repeatedly. It is already in your head, it just needs reinforcing.
Green	You can do this unaided and quickly	Do almost nothing. Check it occasionally and move on.

This list is the single most useful thing you will make during revision, because it converts a vague feeling of "I need to revise loads" into a specific, finite number of hours.

A 7-day revision plan

Use this as a template. Move topics around to fit your exam dates, but keep the order and the spacing.

Days 7 and 6: your red topics

Start with the hardest and the most valuable, while you have energy. For each red topic, work through one worked example slowly, then reproduce it from a blank page, then do three problems unaided. If you can do that, move on. Do not spend an entire evening on one topic.

Days 5 and 4: the rest of red, then your biggest amber topics

Red topics have the highest return because each one is worth more marks than a topic you already know. By day 4, you should have covered everything you genuinely did not understand.

Days 3 and 2: amber topics, and past papers

Amber topics are about speed and durability, not understanding. Do past papers here, under real time conditions, and mark them honestly. Every question you got wrong becomes a specific thing to retest on day 1.

Day 1: error log and formulas

Re-read the mistakes you collected. Redo the questions you failed, from memory, on a clean sheet. Rebuild your formula sheet from a blank page and check what you missed.

Exam day: warm up, do not learn

Read through your one-page sheet once. Do not try anything new. Being slightly under-revised and rested beats being exhausted and anxious.

Space your sessions, do not cram them

This is the part students resist, because cramming feels productive. Spacing sessions out over days is more effective for long-term retention, and the gap is what does the work: your brain revisits the material during that gap, which is when the memory strengthens.

A practical version: if you can only revise a topic once, do it the day before. If you can do it twice, space the sessions two days apart. If you can do it three times, space them across a week. Each additional spaced repetition is worth more than each extra hour on a single day.

You do not need to remember the exact intervals to benefit. You just need gaps.

The four revision methods that work

Active recall

Close the book, ask a question, answer it out loud or in writing, then check. The discomfort of struggling is the point: it is a signal that the memory is being strengthened. If it feels easy, you have chosen material you already know.

Spaced repetition

Review the same material at increasing intervals, focusing on the items you keep failing. Flashcards are ideal for this. The rule for decks is brutal but effective: if you get a card right, review it later; if you get it wrong, review it again tomorrow.

Practice questions under conditions

Exam performance is partly a skill of working under time pressure. A topic you know but cannot answer in six minutes will not earn the mark. Practise timed, and practise the format the exam will use.

Explanation out loud

Explain a topic to an empty room, or better, to a friend, without notes. The moment you cannot continue is exactly where your gap is. This is faster and more honest than rereading.

What to do when you feel behind

Being behind is normal and recoverable. Two mistakes make it worse: trying to cover everything at lower quality, and cutting sleep to make up hours. Sleep is when consolidation happens, so an all-nighter trades a large amount of recall for a small amount of extra content.

When behind: cut the green topics entirely, keep the reds, do one focused session a day rather than five, and protect your sleep. A realistic plan you follow beats an ambitious plan you abandon on Wednesday.

How to stop procrastinating

Procrastination is not laziness, it is usually avoidance triggered by the size or vagueness of the task. A vague "revise chemistry" is intimidating. "Answer questions 4 to 9" is not.

So make the task concrete and tiny: open the document, put a 25-minute timer on, and do one question. You are allowed to stop when the timer ends. Most sessions continue past that, because starting was the only real obstacle.

Also revise at the same time each day. A fixed slot removes the daily decision, and decisions are what you keep avoiding.

The night before the exam

Light review only: your formula sheet, your error log, and a few flashcards. Do not attempt new topics and do not run a full past paper, because discovering a gap at 11pm costs you sleep and confidence. Set a firm stopping time and then stop, because the material consolidates during sleep rather than during more revision.

If you want the detail, we wrote a longer guide on that night specifically: how to handle the hours before an exam, and what genuinely helps versus what just feels productive.

Frequently asked questions

How far in advance should I start revising?

Two to three weeks for most subjects. That gives you enough sessions to cover the material and enough gaps between them for the memory to consolidate.

How many hours a day should I revise?

Three focused hours with real breaks beats eight hours of rereading. If you can sustain six good hours, that is plenty; the limit is your attention, not the clock.

Is rereading notes a waste of time?

Close to it. It creates familiarity, not knowledge. The revision that earns marks is the one where you produce the answer yourself, then check it.

What if I have not started and the exam is close?

Triage, as described above. Cover only red and amber topics, one focused session a day, and protect your sleep. You will still get marks from the topics you know if you are not too exhausted to retrieve them.

Should I revise with friends?

Yes for explaining, no for parallel silence. Quiz each other and talk through problems. Two people rereading in the same room are still just rereading.

How do I stop procrastinating revision?

Make the first action physical and tiny: open the document, set a 25-minute timer, answer one question. Revise at a fixed time daily so you stop deciding when to start.

Keep reading

These go deeper on the same problem, so you can go from understanding the method to actually doing it.

Run this plan with the tools

Building the triage list, testing yourself and keeping an error log only work if you can do them quickly. The free StudyTools tools cover all of it, and Pro removes the daily ceiling when the deadline is close.

AI Tutor to check whether you really understand a red topic
AI Notes to turn a chapter into questions you can test yourself on
Flashcard Maker for the spaced repetition sessions
Study Planner to block these sessions into your week
Focus Timer for the 25-minute sessions that beat procrastination

StudyTools Pro is 3.99 EUR a month and lifts the daily AI limit from 15 to 2000.