How Much Time Do Learners Save With Spaced Repetition?

TL;DR: Spaced repetition schedules each review just before you forget, so you retain
more in far less study time than cramming or re-reading, and the effect compounds over weeks.

What is spaced repetition?

Spaced repetition widens the interval between reviews as a fact sticks, revisiting it right
as memory begins to fade. This beats massed practice for durable recall, and it powers the
flashcard apps that schedule your reviews automatically.

How do common study methods compare?

Here is approximate two-week recall across four common study methods learners use.

How should a beginner start?

Start with ten cards a day and let the schedule widen the intervals for you over time. Keep
each card focused on one idea, and review consistently rather than in rare long bursts.