Education and learning

Why cramming lets you down

Most students have, at some point, stayed up into the small hours trying to squeeze a whole term's work into a single night of revision. The strategy feels productive, and it can even produce a respectable grade the following morning. The trouble lies in what happens afterwards. Researchers who have tested students several weeks after an exam consistently find that crammed information fades far faster than material studied in shorter sessions spread out over time. The explanation seems to be that each return to a topic forces the brain to retrieve what it has partly forgotten, and it is this effort, rather than the sheer number of hours spent reading, that makes knowledge stick. Spacing out revision is not, therefore, simply a matter of sensible time management; it goes to the [1] of how memory actually works.