Spaced Repetition for All: Cognitive Science Meets Big Datahttps://medium.com/tech-quizlet/spaced-repetition-for-all-cognitive-science-meets-big-data-in-a-procrastinating-world-59e4d2c8ede1#.qrx708es4 by smmoonshoes • 9 years ago 20 1 9 years agoMEmedium.com