Best Revision Techniques That Actually Work
Study Skills | All Subjects
The Science Says
- Active recall and spaced repetition are the two most effective study methods according to cognitive science research
- Re-reading notes and highlighting are among the least effective methods
- Testing yourself is harder than re-reading, which is exactly why it works
- Short, focused sessions beat long marathon study blocks
Active Recall
Active recall means testing yourself without looking at your notes. Instead of reading a chapter and feeling like you understand it, you close the book and try to write down everything you remember. This is uncomfortable because you will forget things, but that struggle is exactly what strengthens the memory. Every time you successfully retrieve a piece of information from memory, the neural pathway gets stronger, making it easier to recall next time.
Practical ways to use active recall include: writing questions on the front of flashcards and answers on the back, then testing yourself. Closing your textbook after each section and writing a summary from memory. Using the "blurting" technique — write a topic in the middle of a blank page and write everything you know around it without checking. Then open your notes, find what you missed, and repeat. The effort of retrieval is what makes this method powerful.
Spaced Repetition
Spaced repetition is the practice of reviewing material at increasing intervals over time. Instead of studying a topic once and moving on, you revisit it after one day, then three days, then a week, then two weeks. Each review just before you would forget the material strengthens the memory significantly. This is based on the "forgetting curve" research by Hermann Ebbinghaus, which showed that we forget roughly 70% of new information within 24 hours unless we actively review it.
Apps like Anki automate spaced repetition by tracking which flashcards you find easy or difficult and scheduling reviews accordingly. If you prefer paper, create a simple system with labelled envelopes or boxes: cards you get wrong go back to the daily pile, cards you get right move to the every-three-days pile, then weekly, then monthly. The key is consistency — ten minutes of spaced review every day is worth more than two hours of cramming the night before.
The Pomodoro Technique
The Pomodoro Technique structures your study time into 25-minute focused blocks followed by 5-minute breaks. After four blocks, you take a longer break of 15 to 30 minutes. The method works because 25 minutes is short enough that you can commit to starting without feeling overwhelmed, and the timer creates gentle urgency that keeps you focused. During each block, you work on one task only — no phone, no social media, no switching between subjects. The breaks are essential; your brain processes and consolidates information during rest periods. Use the break to move around, get a drink, or stretch. Do not use it to scroll through your phone, as this replaces one type of concentration with another and does not give your brain the rest it needs.
Mind Maps
Mind maps are visual diagrams that connect related ideas around a central topic. They work well for subjects with lots of interconnected concepts, such as biology, history, and English literature. Start with the main topic in the centre, branch out to subtopics, and add details to each branch. Use colours and simple drawings to make the map more memorable — visual information is processed differently from text and can trigger recall more effectively. The act of creating a mind map is itself a form of active recall, as you are deciding how ideas connect rather than passively copying notes.
Past Papers
Practising past exam papers is one of the most effective revision strategies because it combines active recall with exam technique. You learn the format, timing, and style of questions while testing your knowledge under realistic conditions. Most exam boards publish past papers and mark schemes for free on their websites. Work through them under timed conditions, then mark your own answers honestly using the mark scheme. Pay attention to command words like "describe" (say what it is), "explain" (say why or how), "evaluate" (weigh up pros and cons), and "analyse" (break down into parts). These words tell you exactly what the examiner wants and how to structure your answer.
What Does NOT Work
Re-reading notes: This is the most common study method and one of the least effective. Reading feels productive because the material seems familiar, but familiarity is not the same as understanding. You can recognise information without being able to recall it, and exams require recall.
Highlighting and underlining: Research consistently shows that highlighting has almost no effect on learning. It gives the illusion of engagement while being almost entirely passive. You are making decisions about what is important, but you are not processing or testing the content in any meaningful way.
Copying out notes: Rewriting notes word for word is time-consuming and largely passive. It can be useful if you are reorganising information into a different structure (like turning text into a mind map or table), but copying the same information in the same format achieves very little.
Studying for hours without breaks: Extended study sessions without breaks lead to diminishing returns. After about 45 minutes to an hour, concentration drops sharply. You are better off studying for three focused one-hour sessions with breaks than grinding through a four-hour marathon where the last two hours produce almost no learning.