Brainscape is a web and mobile revision platform that optimizes spaced retrieval to double learning efficiency.  Millions of students and instructors have used Brainscape to create and share adaptive flashcards aligned to their curriculum, or to study premium adaptive flashcards that we have built in partnership with top educators -- such as for the GCSE and A-Level exams.  Brainscape is the best way to improve revision habits and make knowledge stick.