Did you know … spaced repetition was first applied using flashcards

In the 1970s, German science journalist Sebastian Leitner developed a way to apply spaced repetition: increasing intervals between repeating learning material. He created the “Leitner box”, a system of flashcards where correctly answered cards are repeated less often than incorrectly answered ones. By reviewing the material at increasingly longer intervals, the information becomes more deeply anchored in your long-term memory. 

The Drillster smart algorithm ensures spaced repetition based on the individual learner’s answers: adaptive learning. As a result, you learn more in less time, and you retain the material in the long term. 

Sebastian Leitner developed a way to apply spaced repetition: he created the "Leitner box".

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