Editing Flashcard (section)

==== Leitner system ====
[[File:Leitner_system_alternative.svg|thumb|230x230px|In the [[Leitner system]], correctly answered cards are advanced to the next, less frequent box, while incorrectly answered cards return to the first box for more aggressive review and repetition.]]
The [[Leitner system]] is a widely used method of efficiently using flashcards. Originally proposed by the German science journalist [[Sebastian Leitner]] in the 1970s, it is a simple implementation of the principle of spaced repetition where cards are reviewed at increasing intervals.

In this method, flashcards are sorted into groups according to how well the learner knows each one in the Leitner's learning box. The learners then try to recall the solution written on a flashcard. If they succeed, they send the card to the next group. If they fail, they send it back to the first group. Each succeeding group has a longer period of time before the learner is required to revisit the cards. In Leitner's original method published in his book ''So lernt man Lernen'' (''How to learn to learn''), the schedule of repetition was governed by the size of the five partitions in the learning box, which were 1, 2, 5, 8, and 14 centimeters, respectively. The learner only reviewed some of the cards in a section whenever it became full, subsequently moving them forward or backward depending on whether they remembered them.