---
name: spaced-repetition
description: "Remember what you learn with retrieval practice and spaced repetition: choosing what is worth remembering, understanding before memorising, one-fact flashcards and cloze deletions, Anki or Leitner systems, daily review routines, practice questions, card maintenance and application at work. Use whenever someone wants to remember what they learn, make flashcards, use Anki, prepare for an exam or certification, learn vocabulary or technical facts, or stop forgetting material."
license: CC-BY-4.0
metadata:
  author: Afeez Adebayo
  author_url: https://afeezadebayo.com
  author_linkedin: https://www.linkedin.com/in/afeez-adebayo/
  author_x: https://x.com/za_icon
  source: https://afeezadebayo.com/skills-md/productivity/research-learning/spaced-repetition/
  category: productivity
  subcategory: research-learning
  version: "1.0.0"
  created: "2026-10-10"
  updated: "2026-10-14"
---

# Spaced Repetition and Retrieval Practice

Forgetting is fast. Without review, much of what people learn fades within days. Two of the most reliable findings in learning research counter this: retrieval practice (testing yourself rather than rereading) and spacing (reviewing over increasing intervals rather than cramming). Roediger and Karpicke found that students who practised recalling material remembered far more a week later than those who restudied it, and a large meta-analysis by Cepeda and colleagues showed distributed practice improves long-term retention. [Research, Roediger and Karpicke 2006; Cepeda et al. 2006] Spaced repetition software such as Anki schedules reviews automatically, showing each item just before you are likely to forget it.

This skill builds a retrieval and spaced repetition practice for professional knowledge, languages, certifications and study: choosing what is worth remembering, writing good flashcards and practice questions, setting up a review system, keeping daily reviews manageable and combining memory work with understanding and application.

## Operating principles
1. **Remember what you will use.** Make cards for knowledge you need quickly and often.
2. **Understand first, then memorise.** Cards reinforce understanding; they do not replace it.
3. **One fact per card.** Small, precise prompts beat long ones.
4. **Recall before revealing.** Answer in your head or aloud before checking.
5. **Little and often.** Short daily reviews beat long irregular sessions.
6. **Prune ruthlessly.** Delete or rewrite cards that are confusing or no longer useful.

## What to put into spaced repetition
| Good candidates | Poor candidates |
|---|---|
| Definitions and key terms | Whole paragraphs |
| Formulas, shortcuts, commands | Things you can easily look up and rarely need |
| Vocabulary and phrases | Lists of 10 items on one card |
| Key numbers and thresholds (for example Core Web Vitals) | Vague questions with many possible answers |
| Frameworks and their steps | Information you have not understood |
| Common mistakes and fixes | Trivia with no use |

## Card writing rules
| Weak card | Strong card |
|---|---|
| Q: SEO? A: (long paragraph) | Q: What is a good LCP at the 75th percentile? A: 2.5 seconds or less |
| Q: List the CRAAP test criteria and explain each | Several cards, one per criterion |
| Q: What is important about retention? | Q: Formula for net revenue retention? A: (start MRR + expansion - contraction - churn) / start MRR |
| Q: French for many words at once | Q: "I would like" in French? A: je voudrais |
Use cloze deletions for definitions: "Interaction to Next Paint should be {{200 ms}} or less."

## When to use, and when not to
Use it for exam and certification preparation, languages, technical facts, frameworks you use at work, product knowledge for sales and support, and onboarding into a new field.

Don't use it for knowledge you can look up instantly and rarely need, or as the only learning method for skills that require practice.

## Inputs
- What you are learning and why.
- Source material (notes, courses, documents).
- Time available per day.
- Tool preference: Anki, other spaced repetition apps or paper flashcards with boxes.

## Workflow

### Step 1. Choose what to remember
From notes and materials, mark facts, terms and procedures you will need often.

### Step 2. Understand before carding
Make sure you can explain the idea; if not, study it first.

### Step 3. Write cards
One fact per card, clear question, short answer, context where needed, source reference.

### Step 4. Set up the system
A spaced repetition app with a daily review limit, or a paper box system (Leitner) where correct cards move to boxes reviewed less often.

### Step 5. Review daily
Ten to twenty minutes; recall before revealing; rate your recall accurately.

### Step 6. Add practice questions
Beyond cards, use practice problems, past exam questions and explaining aloud.

### Step 7. Maintain
Rewrite cards you keep failing, delete useless ones, add cards from mistakes made at work or in tests.

### Step 8. Apply
Use the knowledge in real tasks; application strengthens memory and shows what matters.

## Review schedule (illustrative)
```
New card -> 1 day -> 3 days -> 1 week -> 2 to 3 weeks -> 1 to 2 months -> longer
Wrong answer -> back to short intervals
```
Apps adjust intervals automatically based on your answers.

## Daily routine
```
1. Review due cards (10 to 15 minutes)
2. Add 5 to 15 new cards from today's learning
3. One practice question or explanation from memory
```

## Leitner box system (paper)
Use five boxes. New cards go in box 1, reviewed daily. Correct answers move a card up one box; wrong answers send it back to box 1. Review box 2 every few days, box 3 weekly, box 4 every two weeks and box 5 monthly. It is simple, needs no app and follows the same spacing principle.

## Writing cards from work
The best cards come from moments of friction: a question you could not answer in a meeting, a mistake caught in review or a term you had to look up twice. Capture these as cards the same day, with the context in which you needed them.

## Measuring retention
Apps show retention rates for mature cards; aim for most reviews to be correct. If retention is low, cards are too hard or too vague; if it is very high and reviews feel easy, intervals can grow or the deck can be trimmed.

## Retrieval beyond flashcards
- Write everything you remember about a topic on a blank page, then check gaps.
- Answer past exam questions under time limits.
- Explain a concept aloud without notes.
- Teach a colleague and answer their questions.
- Solve mixed practice problems without knowing which method each needs.
These forms of retrieval build flexible knowledge that transfers to real tasks better than recognising answers on cards.

Keep decks small and focused on what you use.

## Edge cases and judgement calls
| Situation | What to do |
|---|---|
| Review pile too big | Pause new cards; lower daily new-card limit; delete weak cards |
| Same cards always wrong | Rewrite, split or add an example; check understanding |
| Exam in two weeks | Prioritise practice questions; daily reviews of weakest areas |
| Language learning | Cards for phrases in context, plus listening and speaking practice |
| Team knowledge | Shared decks for product facts or policies, reviewed by owners |
| AI-generated cards | Check accuracy; rewrite into your own words; keep them small |

## Handoffs to related skills
- Learning plans: `learning-plans`
- Reading and notes: `active-reading-notes`
- Deep understanding: `explain-to-learn`
- Habits: the Planning and Task Management `habits-routines` skill

## Worked example
A support specialist moving into technical SEO kept forgetting thresholds, status codes and audit steps. She wrote about 150 cards over a month from her course notes and real audits, one fact per card, and reviewed for 15 minutes each morning. Cards she failed repeatedly were rewritten with examples. After two months she answered client questions about Core Web Vitals and redirects without checking notes, and her first solo audit needed few corrections from her manager.

## Common mistakes
- Long cards with many facts.
- Memorising things not understood.
- Skipping days and facing huge backlogs.
- Rereading cards instead of recalling.
- Never deleting cards that no longer matter.

## Output format
```
1. What to remember and why
2. Card set (question, answer, context, source)
3. Tool and settings (daily limits)
4. Daily routine
5. Practice questions
6. Maintenance rules
```

## Self-check before you answer
- Are cards limited to useful knowledge you understand?
- Does each card test one fact clearly?
- Is there a daily review routine with limits?
- Is memory work combined with practice and application?

---
Created by Afeez Adebayo, Marketing, SEO & Growth Expert
Website: https://afeezadebayo.com
LinkedIn: https://www.linkedin.com/in/afeez-adebayo/
X: https://x.com/za_icon
Source: https://afeezadebayo.com/skills-md/productivity/research-learning/spaced-repetition/

Licence: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). You may copy, share and adapt this skill, including for commercial use, as long as you credit Afeez Adebayo and link to the source URL above. Keep this notice in any copy or adapted version.