EdTech Glossary
Updated January 19, 2026

Spaced Repetition

Definition

A learning technique that involves reviewing information at systematically increasing intervals to move knowledge from short-term to long-term memory.

What is Spaced Repetition?

Spaced repetition is a scientifically-proven learning technique based on the "spacing effect" - the finding that information is better retained when study sessions are spaced out over time rather than crammed into a single session.

The Science Behind It

The technique works by presenting information just as you're about to forget it. This optimal timing:

  • Strengthens neural pathways
  • Builds long-term memory
  • Reduces total study time needed
  • Improves recall accuracy

How Spaced Repetition Algorithms Work

Review Number Interval
1st review 1 day
2nd review 3 days
3rd review 7 days
4th review 14 days
5th review 30 days

Applications

  • Language learning (Duolingo, Anki)
  • Medical education (anatomy, pharmacology)
  • Professional certifications
  • Academic studying

Key Takeaway: Spaced repetition is like compound interest for your brain - small, consistent investments in learning yield exponential returns over time.

Common Questions

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Answer

A learning technique that involves reviewing information at systematically increasing intervals to move knowledge from short-term to long-term memory.

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Spaced Repetition - How It Works & Why It's Effective | ScrollEd