This is a story about repetition. It's a story about how repetition can be used to create patterns, to create rhythm, and to create meaning. It's a story about how repetition can be used to emphasize ideas and to make them more powerful. It's a story about how repetition can
From Wikipedia
Spaced repetition is an evidence-based learning technique that is usually performed with flashcards. Newly introduced and more difficult flashcards are shown more frequently, while older and less difficult flashcards are shown less frequently in order to exploit the psychological spacing effect. The use of spaced repetition has been proven to increase the rate of learning.