Revision Techniques That Work
Most study advice is repeated because it sounds sensible, not because it was tested. When researchers compare methods against each other, a small group pulls ahead and several popular habits sink. Knowing which is which saves you weeks of ineffective effort in the term that matters most.
What the evidence supports
Two techniques come out on top whenever study methods are compared. Practice testing, also called retrieval practice, means closing the book and pulling information out of your head. Distributed practice means spreading that work across days instead of cramming it into one.
A review by Dunlosky and colleagues in 2013 rated ten common techniques. Practice testing and distributed practice earned the highest utility ratings. Highlighting, re-reading and summarising whole texts sat near the bottom, mainly because students mistake the fluency of reading for the ability to recall.
The idea that people learn best in a preferred style, visual or auditory or kinaesthetic, is repeated constantly and supported poorly. Reviews testing the matching hypothesis found little evidence that teaching to a preferred style improves learning. Use the format the material demands.
- Retrieval practice - Recalling material from memory instead of reviewing it on the page.
- Distributed practice - Spreading study of one topic across several days or weeks.
- Learning styles - A popular idea that matching teaching to a preferred style helps; not supported by reviews.
Retrieval practice in practice
Close the notes, write the topic heading, and put down everything you can remember in five minutes. Then open the notes and mark what you missed in a different colour. The gap you find is the revision. Seeing it in your own handwriting beats any summary someone else wrote.
Turn headings into questions before you read. If the chapter is called diffusion, write down what causes it and how temperature changes it, then answer from memory once you have read the section. Reading with questions in mind gives your attention something to hold.
Past papers are retrieval practice with the difficulty turned up, because you must choose the method as well as run it. Do them open-book first to learn the format, then closed-book under time. Marking your own answers against the official scheme teaches you what examiners reward.
- Blank page recall - Write everything you know on a topic from memory, then check and fill the gaps.
- Past papers - Closed-book, timed practice using the exact format and marking scheme.
Spacing and interleaving
Spacing works because each time you retrieve something after a delay you rebuild it with more effort, and that effort is what strengthens the memory. A topic revised on Monday, again on Thursday and once more the following Monday holds better than the same three hours in one afternoon.
Interleaving means mixing topics inside a session instead of finishing one before starting the next. It feels messier and produces more errors during practice, which is why students abandon it. The errors are the point, because an exam asks you to choose between methods, not to run one you were told to run.
A workable pattern is two or three subjects per session in short blocks, with a recall test at the end of each block. Keep a running list of what you got wrong. That list is the first ten minutes of your next session.
Scale the spacing to the exam date. Material tested in three months can take four or five passes, while material tested next week fits two. Working backwards from the paper tells you how many reviews each topic can realistically have, and it stops you planning a schedule that only exists on paper.
- Interleaving - Mixing related topics in one session so you practise choosing between them.
Dropping techniques that feel productive
Re-reading and highlighting feel effective because the text becomes familiar. Familiarity is not recall. If you cannot state the argument with the page closed, you have not learned it yet.
Summarising whole chapters usually turns into copying. A better use of that time is one claim per paragraph in your own words, then testing yourself on the claims until you can produce them unprompted.
Colour-coded notes help you find things later, which is a filing benefit rather than a learning one. Keep them if they save you time, and stop counting the hours spent making them as revision.
- Fluency illusion - Mistaking the ease of reading for the ability to recall the material later.
A weekly routine that survives term time
Fix three or four short slots per week rather than one long one, and open each slot with a recall test on the previous week's material. Half an hour four times a week beats a single four-hour session, and it survives a busy timetable with placements, seminars and shifts.
Review the wrong-answer list on Friday and build next week's questions from it. If a topic keeps appearing there, you are still guessing at it. Ask a tutor or a study group before the exam period starts, while there is still time to fix the gap.
- Recall starter - Beginning every study slot with a closed-book test on older material.