Spaced repetition means reviewing a topic at increasing intervals: 1 day, 3 days, 1 week, 1 month. The goal is to review right as you start forgetting — because the moment recall gets difficult is exactly the moment repetition sticks best.
The Forgetting Curve
Most of what you just learned disappears within the first 24 hours. Without any review, very little is left after a week. What spaced repetition does is pull that decline back up with every review — and make it drop more slowly each time.
The critical detail: review too early (while you still remember easily) and it barely helps; review too late (after you've fully forgotten) and you're relearning from scratch. The ideal moment is when recall feels effortful but is still possible.
A Workable Review Schedule
| Review | When | Length |
|---|---|---|
| 1st review | Same evening you finish the topic | 5-10 min |
| 2nd review | 1 day later | 5-10 min |
| 3rd review | 3 days later | 5 min |
| 4th review | 1 week later | 5 min |
| 5th review | 1 month later | 5 min |
| 6th review | 3 months later / before a big exam | 5 min |
Notice the reviews are short. Spaced repetition isn't "re-studying the topic" — it's trying to recall the headline points in 5 minutes, or writing formulas from memory on a blank page.
How Should You Review?
The most common mistake is making review passive. Re-reading your notes is not review. Effective review looks like this:
- Close your notebook, look at the topic heading, and write down what you remember.
- Try to write formulas from memory on a blank page.
- Solve 3-5 questions on that topic.
- Only then open your notes to fill in the gaps.
How to Track Your Repetitions
Tracking this by hand gets hard fast — 30 topics means 30 separate review schedules. A simple fix: keep one line per topic and check off review dates as you go.
✅ Mar 12 (learned) → ✅ Mar 13 → ✅ Mar 16 → ⬜ Mar 23 → ⬜ Apr 23
That way you can see at a glance which topic is due for review. Tracking this inside an app instead of on paper also removes the risk of losing the list entirely.
Frequently Asked Questions
It’s highly effective for content you need to remember — formulas, definitions, vocabulary, dates. For subjects that require problem-solving skill, regular practice matters more than pure review.
The system doesn’t break — that particular review just feels a bit harder. Do it the day you notice you missed it, then continue the schedule from there.
5-6 reviews before the exam are enough for most topics. For topics you keep struggling with, shorten the intervals and add more reviews.
Related Posts
- Active Recall: Learning That Actually Sticks
- How to Review a Topic Effectively
- The Feynman Technique
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