Flashcards

A Flashcard deck is a set of two-sided study cards (question on the front, answer on the back — with math/formulas on Science decks) about a domain, category, subcategory or topic. Build a deck, then study it with spaced repetition: for each card you flip to check yourself and rate how well you knew it — Again / Hard / Good / Easy. Cards you find hard come back soon; easy ones drift days or weeks into the future, which is what actually moves them into long-term memory. Everyone has their own private schedule, so a shared deck is studied at each person's own pace. Share a deck with friends or the whole public.