Two of the most reliable findings in learning research are the testing effect (retrieving information strengthens memory more than reviewing it) and the spacing effect (reviews spread out over time beat the same amount of cramming).
Active recall
Instead of rereading notes, close them and try to produce the answer: explain a concept out loud, answer practice questions, or use flashcards. In a well-known 2006 study, Roediger and Karpicke found students who practiced retrieval remembered far more a week later than students who restudied, even though restudying felt more effective at the time.
Spaced repetition
Memory fades along a forgetting curve, first described by Hermann Ebbinghaus. Each successful review flattens the curve, so you can wait longer before the next one.
A simple schedule
- Day 0: learn the material and quiz yourself once.
- Day 1: review what you missed.
- Day 3: full self-test.
- Day 7: self-test again.
- Day 14 and later: test before the exam, focusing on weak items.
Making it practical
- Turn headings in your notes into questions.
- Mix topics in one session (interleaving) once the basics are solid.
- Track misses; those are your next review.