Close-and-recall before re-reading

After reading a section, close the book and write down everything you remember before looking again.

Why it works

Re-reading without prior recall tests recognition, not retrieval. Closing the material removes the recognition scaffold and forces the learner to attempt generation — which reveals what is actually encoded versus what is merely familiar. The generation attempt also constitutes additional encoding: successful retrieval strengthens the memory trace, and retrieval failure precisely identifies the gap that needs work.

How to do it

1. Read one natural section (a page, a concept unit, a problem type).
2. Close or turn over the material immediately.
3. Write down everything you can recall — including structure, examples, and nuances.
4. Only then re-open and compare your recall to the text; treat every gap as the next study target.

Evidence

The testing effect is one of the most replicated findings in learning science: retrieving information from memory produces better long-term retention than re-reading, with effects documented across ages, subjects, and material types. (rct)

The testing effect is largest for retention of factual content; for building conceptual understanding and transfer, retrieval combined with elaboration outperforms retrieval alone.

Sources

• Roediger & Karpicke (2006), "Test-enhanced learning: Taking memory tests improves long-term retention," Psychological Science

Common mistake

Peeling back the corner of the page to check the answer while "recalling," which substitutes recognition for retrieval and defeats the entire exercise.