Introduction
Have you ever reviewed a topic one day, only to forget it a week later? This isn’t a sign of failure—it’s how memory works. Our brains naturally forget information unless it’s reviewed at the right intervals. That’s where spaced repetition comes in. Used by top-performing IB and AP students, this technique maximizes retention by revisiting material at scientifically proven intervals. In this guide, you’ll learn how spaced repetition works and how to apply it for exam success.
Quick Start Checklist
- Learn the forgetting curve and how spaced repetition combats it.
- Use digital tools like Anki or Quizlet for efficient practice.
- Apply active recall instead of passive review.
- Schedule reviews across weeks and months, not just days.
- Combine spaced repetition with past papers for exam mastery.
The Forgetting Curve
German psychologist Hermann Ebbinghaus discovered the forgetting curve, which shows how quickly we lose information after learning it:
- After 1 day: ~50% forgotten.
- After 1 week: ~80% forgotten.
But when you review material just before forgetting, the memory strengthens. Each review makes the curve flatter, meaning you retain knowledge longer.
How Spaced Repetition Works
Spaced repetition schedules reviews at increasing intervals:
- 1st review: 1 day later.
- 2nd review: 3 days later.
- 3rd review: 1 week later.
- 4th review: 2–3 weeks later.
This “spacing effect” ensures you review information just as it’s about to fade, locking it into long-term memory.
