Spaced Repetition: The Study Technique That Changes Everything

In the 1880s, a German psychologist named Hermann Ebbinghaus spent years memorising lists of nonsense syllables, then testing himself at different intervals. What he found became one of the most replicated findings in the psychology of learning: the forgetting curve.

Left alone, we forget most of what we learn within 24 hours. But each time we successfully retrieve a memory, the forgetting curve flattens — we forget more slowly next time.

The practical implication is profound, and most students have never been taught it.

What Spaced Repetition Actually Means

Spaced repetition is the practice of revisiting material at increasing intervals, timed to just before you'd naturally forget it.

Instead of studying a topic once for 3 hours, you study it:

• Day 1: 30 minutes
• Day 3: 20 minutes
• Day 8: 15 minutes
• Day 21: 10 minutes

Total time: 75 minutes. Retention: dramatically better than the 3-hour block.

This isn't intuition — it's one of the most robust findings in cognitive science. Multiple meta-analyses confirm that spaced practice produces better long-term retention than massed practice, often by a factor of 2x or more.

Why Students Don't Do It

Because cramming feels like it works.

After a 6-hour study session, you feel like you know the material. And in the short term, you do — you can answer questions on it immediately after. The problem is that most of that learning disappears within 72 hours without reinforcement.

Spaced study sessions, by contrast, feel harder in the moment — you've partially forgotten things, and retrieving them requires effort. That effort is exactly what creates durable memory. But it's uncomfortable, which makes it feel less effective even when it's vastly more so.

How to Implement Spaced Repetition

Option 1: Use Anki

Anki is the gold-standard app for spaced repetition. You create flashcards (or import them), and the algorithm automatically schedules each card based on how well you recalled it last time — harder cards come back sooner, easy cards are deferred.

The catch: creating Anki cards takes time. Many students give up before they see the benefits because the setup cost feels too high.

Option 2: Use Axiom's Flashcard System

Axiom automatically generates flashcards from your lecture content — weighted by emphasis, so the most important concepts get more cards. It also schedules them using a spaced repetition algorithm, so you don't have to manage the timing yourself.

The advantage is zero setup time: upload your lecture, get flashcards, start reviewing. The system handles the scheduling.

Option 3: Manual Spacing

If you'd rather not use apps, you can implement a simple version manually:

• After each lecture, write a one-page summary from memory
• Revisit that summary 48 hours later
• Revisit again 7 days later
• Revisit again 3 weeks later

It's less optimised than an algorithm but far better than no spacing at all.

What to Space

Not everything benefits equally from spaced repetition. It's most powerful for:

• Factual content — definitions, formulas, cases, dates
• Procedural content — steps in a process, how to apply a framework
• Language — vocabulary, grammar rules

It's less relevant for:

• Conceptual understanding — this is built through thinking and application, not just retrieval practice
• Skills — essay writing, problem-solving, moot court

A comprehensive study approach combines spaced retrieval for facts with active problem-solving for skills.

The Bottom Line

If you implement one change to your study habits this semester, make it this: stop the night-before cram and start spreading your study across multiple sessions with gaps between them.

You'll spend the same total hours. You'll retain dramatically more. And you'll walk into your exams with genuine knowledge, not short-term working memory that evaporates under pressure.

Ebbinghaus figured this out 140 years ago. Most students still haven't caught up.

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