Does cramming work?

The short answer

Cramming can get you through a test the next day. But what you cram fades fast, and spreading the same study time over several days works better. In one flashcard study, spacing beat cramming for 90% of students, yet most of them believed cramming had worked better. Cramming feels effective because the material feels familiar while you’re doing it.

Why it feels like it works

When you’ve just read something five times, it feels easy to recognise. Recognising isn’t the same as recalling it in an exam, with nothing in front of you. That gap is why crammed material can vanish when you see the question.

If you have to cram tonight

1. Pick what’s worth points. Look at past papers or the review sheet and cover those topics first.
2. Test yourself instead of re-reading. Read a section once, close the book, write what you remember, then check.
3. Do practice questions. Even a few past questions show you what the exam wants.
4. Take short breaks every 45 to 50 minutes. The focus timer keeps you honest.
5. Sleep. An all-nighter costs you on the easy questions. Stop in time to get some sleep.

Next time, space it out

Study the same hours across more days instead. Review each topic a day later, a few days later and a week later. The spaced review calendar and flashcards do the scheduling for you.

Source: Kornell, N. (2009). Optimising learning using flashcards: Spacing is more effective than cramming. Applied Cognitive Psychology, 23(9).