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Study guide
Most studying is wasted on techniques that feel productive but don't last — re-reading, highlighting, cramming. A handful of methods, proven across decades of research, work far better. Here's what they are, why they work, and how to use them. They're the same ideas built into Koydo Flashcards.
Review at growing intervals so it sticks — with far less effort.
Pull the answer from memory — it's the act of retrieving that builds it.
Memory fades fast — and predictably. A few reviews flatten the curve.
Mix problem types in one session — it's harder, and it sticks better.
Good cards, answered from memory, reviewed on a schedule.
Spread study over days — the same hours, far more remembered.
Want to see how spacing flattens the forgetting curve? Try our free spaced repetition calculator, or read where our cards come from and the research behind them on the sources page.