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How does the Leitner system improve memorization?

By Randy Salars

Short Answer

The Leitner system is a flashcard method that sorts cards into boxes with different review schedules. Correct cards move to less-frequent boxes; missed cards return to frequent review.

Why This Matters

Because hard cards resurface sooner, you spend your time where you’re weakest, while easy cards naturally space out. That creates efficient spaced repetition without needing a complex algorithm, which leads to better long-term retention per minute studied.

Where This Changes

It works best when each card tests one clear idea and you grade yourself honestly. For interconnected concepts, add “explain why” prompts or practice problems so the system doesn’t become purely rote recall.

Related Questions

What is spaced repetition and why does it work?What is active recall and how is it different from re-reading?Which memory apps are most effective (Anki, Quizlet, etc.)?What are the different types of memory (short-term, long-term, working)?How does the brain encode and retrieve memories?
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