Die Lernbox (DIN A8)

How does learning with the box work? Cards that are to be re-learned come in tray 1. Take a card, read the question, consider the answer, and then check it. With the right answer, the card moves one compartment further. If the answer is wrong, it must be returned to bin 1. Bins 2,3,4 and 5 are not processed until they are full.