Why testing yourself beats rereading your notes
Most of us revise by rereading. We highlight, we skim, and the page starts to feel familiar. The trouble is that familiarity is not the same as being able to recall something when the page is gone — which is exactly what an exam asks you to do.
Recognition vs. recall
When you reread, you are practising recognition: “yes, I’ve seen this before.” When you answer a question from memory, you are practising recall: pulling the idea out of your head without help. Recall is the skill you need on exam day, so it’s the one worth training.
Make it a little bit hard
Retrieval practice feels slower and more uncomfortable than rereading. That effort is a feature, not a bug — struggling to remember, then checking the answer, is what makes the memory stronger next time.
- Close the book first. Write down everything you remember about a topic, then compare against your notes.
- Turn headings into questions. “The Calvin cycle” becomes “What does the Calvin cycle produce, and what does it need?”
- Use flashcards honestly. Say the answer out loud before you flip. If you hesitated, rate it Hard.
- Mix topics. Short quizzes that jump between ideas are more like a real exam than practising one topic at a time.
Space it out
Recall works best when it’s spread over days rather than crammed into one evening. Reviewing a card just as you’re about to forget it is more useful than reviewing it five times in a row. That’s why flashcard ratings matter: they decide when each card comes back.
A simple routine
After each lecture or reading, spend ten minutes answering questions on it. The next day, review whatever you found hard. At the end of the week, sit a short mixed quiz. It’s less time than rereading — and far more of it sticks.