The Leitner system (a.k.a Leitner Boxes) is a powerful learning system for memorising information using flashcards. It was created by the German science journalist **Sebastian Leitner**.

It basically consists of dividing your deck of cards in boxes and studying each box separately depending on how often you recall them.

## It's really simple!

The example below assumes that you are using 3 boxes, but the idea is the same with more boxes.

**1️⃣ You start with Box 1**

- All cards start in box 1.
- You should revise the cards in Box 1
**every day**.

**2️⃣ Next up is Box 2**

- If you know a card that is in Box 1, it moves to Box 2, otherwise it stays in Box 1.
- You should revise the cards in Box 2 every
**three days**.

**3️⃣ Last up is Box 3**

- If you know a card from Box 2, it moves to Box 3; if you don't, it goes back to Box 1.
- You should revise the cards in Box 3 every
**five days or so.**

## A (moving) picture is worth a thousand words

## References you should check