Spaced repetition in : Expanding retrieval

Review just before you would forget — the most replicated schedule in learning science. Spaced repetition schedules a review just before the forgetting curve would drop the trace — Ebbinghaus mapped that curve in 1885; Cepeda and colleagues later measured expanding gaps in live learners.

This atlas ranks it near the top for evidence, exam fit and long retention, and middling for first-week speed — early hours go to card design. Use it as a calendar for facts you must still name in six months — not as a substitute for a blank-page problem. Spaced repetition: What is this, in one honest paragraph?

A schedule that asks for a retrieval just before you would have forgotten, then lengthens the gap after a success. Spaced repetition: What does the evidence actually say? Ebbinghaus showed savings on relearning; Cepeda et al. found expanding gaps beat cramming for delayed tests; Leitner and SuperMemo turned the idea into boxes and algorithms.