When a teacher tells you to start studying weeks before the exam rather than waiting until the last minute, he or she is really advising you to use .

distributed practice

Explanation:

When a teacher tells you to start studying weeks before the exam rather than waiting until the last minute, he or she is really advising you to use distributed practice.

Distribution practice is a learning strategy where practice is broken up into number of short sessions over a long period of time,For example, studying something during two different sessions with a break of a few days (or even hours) in between, rather than learning it all in one go,to qualify as distributed practice each learning session must focus on the same subject