How to Use Spaced Repetition to Remember More

Slug: spaced-repetition-study-techniquePillar: Education > Student GuidesKeyword: spaced repetition study techniqueExcerpt: Spaced repetition is one of the most evidence-backed study techniques. Here is exactly how to use it to remember more in less time.

What Is Spaced Repetition?

Spaced repetition is a study technique based on one of the most robust findings in cognitive science: we remember information better when we review it at increasing time intervals, rather than cramming it all at once. Instead of reviewing your notes once before an exam, you review the same information on day 1, then day 3, then day 7, then day 14, and so on. Each time you successfully recall it, the next review is scheduled further away. Each time you struggle, it comes back sooner.

This mirrors how memory consolidation actually works in the brain. The "forgetting curve," first described by Hermann Ebbinghaus in 1885 and repeatedly confirmed since, shows that we forget about 70% of new information within 24 hours — unless we review it at the right moment. Spaced repetition exploits the optimal review timing to make each session maximally effective.

The Science: Why It Works

Every time you successfully retrieve a piece of information from memory, the neural pathway for that memory is strengthened. Reviewing material just as you are about to forget it — the "desirable difficulty" sweet spot — produces the strongest encoding. Studies published in journals including Psychological Science and Cognition consistently show that spaced practice leads to 50–80% better long-term retention compared to massed (same-day) practice, while using the same amount of total study time.

How to Get Started with Spaced Repetition

Option 1 — Use Anki (Free, Highly Recommended)

Anki is the gold standard spaced repetition software and is free on desktop (anki.web.net) and on iPhone and Android. You create digital flashcards and Anki's algorithm schedules your reviews automatically. After each card, you rate how well you remembered it (Again / Hard / Good / Easy), and the algorithm adjusts the next review date accordingly. The AnkiWeb syncing means your deck is available across all devices.

To start: download Anki, create a new deck for each subject, and add cards as you encounter new material — do not wait until you have "finished" the topic. The most effective cards have a single question on the front and a single clear answer on the back. Avoid cramming multiple facts onto one card.

Option 2 — Use Notion or a Spreadsheet with a Manual Schedule

If you prefer not to use a separate app, create a simple table in Notion or Google Sheets with columns: Concept, First Review, Review 2 (3 days later), Review 3 (1 week), Review 4 (2 weeks), Review 5 (1 month). Colour-code by subject and check off each cell when reviewed. This is more manual but gives you full control.

Option 3 — Use Physical Flashcard Boxes (The Leitner System)

Hermann Leitner's original system uses a box divided into five sections. New cards go in box 1 (review daily). Cards you answer correctly move to box 2 (review every other day), then box 3 (weekly), box 4 (fortnightly), box 5 (monthly). Cards you get wrong drop back to box 1. This works well for language learning and fact-heavy subjects like medicine or law.

What Content Works Best with Spaced Repetition

Spaced repetition excels for factual knowledge: vocabulary, definitions, dates, formulae, anatomy, historical events, legal statutes, and foreign language phrases. It is less suited to conceptual understanding and essay writing, where practice testing and retrieval practice are more appropriate. Use spaced repetition alongside, not instead of, deeper study techniques.

Common Mistakes to Avoid

Making cards too complex is the most common mistake — if a card has more than one question, split it. Reviewing without trying to recall first defeats the purpose — always attempt the answer before flipping the card. Letting reviews pile up is a motivation killer — 15–20 minutes daily is far more effective than a two-hour marathon session once a week. Passive re-reading is not spaced repetition — every review must involve active recall.

Building the Daily Habit

The key to spaced repetition is consistency over intensity. A 15-minute Anki session each morning builds a habit that, over a semester, accumulates thousands of reviewed items. Pair it with an existing habit (morning coffee, commute) to anchor it. Most users report that after three to four weeks, the daily review feels automatic.

For more study guides, visit our Education hub or read our article on How to Use Mind Mapping for Studying and Remembering More.

Frequently Asked Questions

Is Anki suitable for non-students? Absolutely. Professionals use Anki for language learning, medical CPD, legal updates, and retaining information from books. It is not just for students.

How many cards should I make per day? A sustainable rate for most people is 10–30 new cards per day. More than this leads to an unsustainable review backlog within weeks. Quality matters more than quantity.

Can I download pre-made Anki decks? Yes — the Anki shared deck library has thousands of pre-made decks for medicine, languages, law, history, and more. This is a great starting point, though personalised cards you made yourself tend to stick better.

How long until I see results from spaced repetition? Within two to three weeks of consistent daily use, most users notice a significant improvement in recall speed and exam confidence.

Does spaced repetition work for language learning? It is arguably the single most effective technique for vocabulary acquisition. Many polyglots and language learners credit Anki as the foundation of their method.