If you only learn two study techniques, make them these. Active recall and spaced repetition are the closest thing studying has to a cheat code — and both are free.
Active recall: test yourself instead of re-reading
Re-reading notes feels productive but doesn't stick well. Active recall means closing the book and trying to remember the material from memory — through practice questions, flashcards, or simply writing down everything you know about a topic. The effort of remembering is exactly what strengthens the memory. It feels harder than re-reading, and that's the point.
How to use it
- After reading a section, close it and write a summary from memory.
- Turn your notes into questions, then answer them without looking.
- Use flashcards for facts, formulas, and definitions.
Spaced repetition: review at the right time
You forget most new information within days unless you revisit it. Spaced repetition means reviewing material at increasing gaps — for example after one day, then three days, then a week, then two weeks. Each time you successfully recall something, you can wait a little longer before the next review.
Putting them together
Combine the two: make flashcards (active recall) and review them on a spaced schedule. Apps can automate the timing, or you can do it with a simple box of cards and a calendar.
Both methods feel slower and harder than highlighting and re-reading. But they're the reason some students study less and remember more.