Spaced Repetition
Spread it out over days and weeks
What the Research Says
Your brain forgets things on a predictable curve. Hermann Ebbinghaus discovered this in 1885: without review, you lose about 70% of new information within 24 hours. But each time you revisit material at the right moment — just as you're about to forget — the memory becomes stronger and lasts longer. History is a content-heavy subject: with 12 units and over 117 lessons across different centuries and continents, spacing is the only practical strategy that gets everything into long-term memory before exam day.
Evidence Base
| Study | Finding | Impact |
|---|---|---|
| Ebbinghaus (1885) | Discovered the forgetting curve — memory decays exponentially without review | Foundation of all spacing research |
| Cepeda et al. (2006) | Meta-analysis of 254 studies confirmed spacing produces stronger long-term retention than massing | Effect holds across ages and subjects |
| Dunlosky et al. (2013) | Distributed practice rated HIGH utility across all learning contexts | One of only two top-rated techniques |
| Bjork & Bjork (1992) | "Desirable difficulties" — spacing feels harder but produces deeper learning | Explains why cramming feels effective but isn't |
Step-by-Step Method
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1
List all your topics — Write out every lesson across your units. You have around 117 lessons — group them by unit to manage the volume.
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2
Build a 6-week timetable — Start at least 6 weeks before your exam. Schedule 2–3 topics per day, 30–45 minutes per session.
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3
Schedule at increasing intervals — After studying a topic, revisit it at Day 1, Day 3, Day 7, Day 14, then Day 30. Each review gets shorter because you remember more.
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4
Traffic-light after each test — After each retrieval attempt, rate the topic: Green (confident), Amber (some gaps), Red (major gaps). Reds get shorter intervals.
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5
Adjust your spacing — Move green topics to longer gaps (14–30 days). Keep red topics on short cycles (1–3 days) until they become amber or green.
When and How Often
Plan once, then follow the schedule daily. Each review session uses retrieval practice (brain dumps or self-quizzing) — not re-reading. Start 6–8 weeks before your exam to give every topic at least 4 review cycles.
Monday: Study the Soweto Uprising for 20 minutes. Brain dump key facts: Afrikaans Medium Decree (1974), 16 June 1976, Hector Pieterson killed, Steve Biko dies in police custody September 1977, BCM organisations banned October 1977, approximately 600–700 deaths in the protest wave.
Tuesday: 10-minute retrieval — write down everything from yesterday. Rate: Amber (forgot the BCM ban date and Tsietsi Mashinini's role as student leader).
Monday: 8-minute retrieval. Now confident on the main chronology and key figures. Can also connect Biko's death to the Anti-Apartheid Movement's growing international pressure. Rate: Green. Move to 14-day gap.
Monday: 5-minute retrieval. Still solid. Quick check confirms all key content intact — including the Sam Nzima photograph as a source the exam might use. Rate: Green. Final review scheduled for exam week.
Total time on this topic: about 53 minutes across 6 weeks — far more effective than one 53-minute cram the night before.
Common Mistakes
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Cramming the night before — Massed practice creates short-term familiarity that fades within days. Spacing the same total time across weeks produces lasting memory.
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Revising the same topic every day — Daily repetition of the same material gives diminishing returns. Space it out and use the gaps to cover other units.
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Ignoring weaker topics — It is tempting to keep reviewing what you already know. Use the traffic-light system to force yourself back to red topics.
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Starting too late — Spacing only works if you start early enough to fit in multiple review cycles. Six weeks is the minimum; eight is better.