Study skills

Spaced review

Why spaced short reviews beat one long session, and how to schedule them.

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What this guide covers

This guide explains spaced review in plain terms. It is written for current students and covers the key concepts you need without assuming prior knowledge.

Recall curve chart

The chart below shows how recall fades between sessions — and how each additional review slows the forgetting.

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Estimated recall on day 30: 13%

Illustrative model of recall (percent), not measured data. Real results depend on the person and the material. Model: recall = exp(−t / S), where S doubles after each review (starting at 2.5 days).

Key concepts

The core ideas in this guide are explained step by step. Where a term has a specific meaning in higher education, it is linked to the glossary.

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