Spaced repetition is a study method where you review information at increasing intervals — a day later, then a few days, then a week, then a month. Each successful recall pushes the next review further out. It is one of the most reliable, best-evidenced ways to move facts into long-term memory, and it is the engine behind HopQuiz.
In the 1880s, psychologist Hermann Ebbinghaus showed that we forget newly learned information rapidly at first, then more slowly — a shape now called the forgetting curve. Left alone, a fact you learn today may be mostly gone within days. But each time you successfully recall it, the curve flattens: you forget more slowly, so the next review can wait longer.
Cramming packs many reviews into one session, right before you need the information. It works for a test tomorrow and fails for a test next month, because massed practice produces memories that fade fast. Spacing the same number of reviews across days or weeks produces far stronger, longer-lasting recall — the well-documented spacing effect. The counter-intuitive part: letting yourself almost forget before reviewing is what makes the memory stick.
A simple schedule doubles the gap after each success: review a new card after 1 day, then 2, 4, 8, 16 days, and so on. Miss a card and it resets to “due now,” returning in your next session. Because easy cards quickly move to long intervals, your daily reviews stay small even as your deck grows — you spend your time on exactly the cards you are about to forget.
HopQuiz schedules every card for you. Study a deck, grade each answer, and correct cards are pushed further into the future while missed ones stay due. The Study due view gathers every card ready for review across all your decks, so a few minutes a day keeps everything fresh. You do not have to track anything — just show up and answer.
Want to try it now? Browse free flashcard decks or open HopQuiz and build your own. Pair this with good cards — see how to make flashcards that stick.