How to Use Spaced Repetition

Spaced repetition is the practice of reviewing information at increasing intervals to combat the natural forgetting curve. It is one of the most efficient learning techniques ever discovered — you review material right before you would forget it, which maximizes retention while minimizing study time. Combined with active recall, spaced repetition can help you remember almost anything, almost permanently, with surprisingly little effort.

The forgetting curve describes how memory decays over time without review — we lose most of what we learn within days. Each review resets the curve and makes it decay more slowly, so you can wait longer before the next review. By reviewing at expanding intervals — 1 day, 3 days, 1 week, 2 weeks, 1 month — you flatten the forgetting curve and build long-term memory efficiently. The key insight: reviewing too soon wastes time, and reviewing too late means relearning. Spaced repetition hits the sweet spot.

1. 1
   Break material into cards or items

   Each fact, concept, or question becomes one reviewable unit.

2. 2
   Review after 1 day

   Your first review should happen the day after initial learning.

3. 3
   If recalled easily, extend the interval

   Next review in 3 days, then 1 week, then 2 weeks, then 1 month.

4. 4
   If forgotten, reset the interval

   If you could not recall, study it again and review tomorrow. The interval resets.

5. 5
   Use spaced repetition software

   Apps like Anki handle the scheduling automatically. You just study and rate your recall.

6. 6
   Review daily in short sessions

   10–20 minutes daily beats long weekly sessions. Consistency is key.

• Always combine with active recall

  Spaced repetition only works if each review is an active retrieval, not passive re-reading.

• Keep cards atomic

  One concept per card. Complex cards are hard to schedule and review efficiently.

• Be honest about recall

  Rate "easy" only if you truly knew it instantly. Over-rating leads to forgetting.

• Make your own cards

  Creating cards is itself active learning. Pre-made decks are less effective.

• Cramming all reviews in one day

  Spaced repetition requires spacing. Batching reviews defeats the entire purpose.

• Making cards too complex

  Cards with multiple facts are hard to rate and schedule. Keep each card to one idea.

• Skipping days

  Consistency matters. Missing days lets reviews pile up and breaks the habit. Even 5 minutes daily is better than skipping.

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