What it is
The Leitner system uses boxes (or app decks) — cards you know move to longer-interval boxes; cards you miss return to box one.
When to use it
Ideal if you study with physical flashcards or apps like Anki.
How to do it
- Start all new cards in box 1 (review daily).
- Move correct cards to box 2 (every 2 days), then box 3 (weekly).
- Missed cards always go back to box 1.
Common mistakes
- Moving cards forward without truly recalling them.
- Skipping daily box-1 reviews.
- Using too many boxes too early.
Your 1-minute action
Label 3 envelopes Box 1–3 and sort 10 flashcards into Box 1.