Retrieval practice

Also called Testing effect, Active recall, Spaced repetition, Interleaving

Making yourself remember something without looking. The best-evidenced revision method there is.

What it is

Retrieval practice is recalling information from memory rather than reviewing it — closing the book and writing down what you know, self-testing, flashcards, answering questions from memory.

Spacing is doing it repeatedly over time rather than all at once. Interleaving is mixing topics rather than blocking them.

Where it applies

Every subject. The effect is one of the most replicated findings in cognitive psychology.

How it works

Retrieving strengthens the memory more than reviewing does. The struggle is the mechanism — if it feels easy, it is probably not working.

That is also why it is unpopular: re-reading feels productive and produces a strong sense of familiarity, which is not the same as being able to recall anything.

Spacing works because forgetting a little between sessions makes the next retrieval harder and therefore more effective.

How to use it in your work

Cover the page, write what you remember, then check. Every gap you find is the revision.

Use flashcards for facts, blank-page recall for topics, and past papers for whole skills.

Space it: three twenty-minute sessions across a week beat one hour tonight. Start earlier than feels necessary.

Highlighting is not revision. Neither is copying out notes.

Where to get help

The Education Endowment Foundation's evidence summaries, and the Learning Scientists' free materials on the six strategies.