Ask a student how revision is going and you will usually hear a number of hours. It is the metric that is easiest to count, and it is the one most weakly connected to what happens in the exam hall.
Re-reading feels like learning
Reading notes again produces a strong sense of familiarity. Familiarity is not retrieval. In the exam you are asked to produce information from an empty page, which is a different task from recognising it on a page you have already seen.
Test yourself before you feel ready
Closing the notes and writing down everything you remember is uncomfortable, and that discomfort is the point. Retrieval practice reliably outperforms review in study after study, precisely because it forces the effort that review avoids.
Spread the same hours further apart
Four separate half-hour sessions across a fortnight beat one two-hour session, using identical time. Spacing lets partial forgetting happen, and relearning after partial forgetting is what makes memory durable.
Count outputs, not hours
Change the metric. Instead of 'three hours of Chemistry', aim for 'twenty questions attempted and marked' or 'one topic explained aloud without notes'. Outputs are honest in a way that hours are not.
- Revision
- Study Skills