What is Spaced Repetition?
Spaced Repetition System (SRS) is a learning technique that schedules reviews of information at increasing intervals. Instead of cramming everything at once, you review items just before you're about to forget them—maximizing retention with minimum effort.
The Science: The Forgetting Curve
German psychologist Hermann Ebbinghaus discovered that we forget information predictably over time. Without review:
- After 1 day: You forget 50-80% of new information
- After 1 week: You forget 90% of what you learned
Spaced repetition fights this by reviewing at optimal moments, strengthening memory each time.
Optimal Review Intervals
Research shows these intervals work best:
- First review: 1 day after learning
- Second review: 3 days later
- Third review: 7 days later
- Fourth review: 14 days later
- Fifth review: 30 days later
- Continue: 2-3 months, then 6 months
Best Spaced Repetition Apps
1. OpenQuiz (Best for Conversation-Focused Learning)
- AI-generated flashcards from photos
- Context-based learning in full sentences
- Integrated conversation practice
- Adaptive AI learning paths
2. Anki (Most Customizable)
- Completely free and open-source
- Highly customizable intervals
- Supports images, audio, video
- Steep learning curve
3. Quizlet (Most User-Friendly)
- Easy to use interface
- Large library of pre-made sets
- Multiple study modes
- Limited SRS features in free version
How to Use Spaced Repetition Effectively
1. Learn Words in Context
Don't just memorize isolated words. Create flashcards with full sentences:
❌ Bad: ambitious = having ambition
✅ Good: She's very ambitious and plans to start her own company.
2. Keep It Simple
One concept per flashcard. Don't try to learn multiple meanings or grammar rules on one card.
3. Add Audio
Include native speaker pronunciation. Hearing the word helps with listening comprehension and speaking.
4. Use Images
Visual associations strengthen memory. Add relevant images to flashcards when possible.
5. Review Daily
Consistency beats intensity. 15 minutes daily is better than 2 hours once a week.
Common Mistakes to Avoid
1. Creating Too Many Cards at Once
Start with 10-20 cards per day. Adding 100 cards creates an overwhelming review burden later.
2. Not Personalizing Cards
Pre-made decks are convenient but less memorable. Creating your own cards (even with AI help) improves retention.
3. Skipping Reviews
The system only works if you review on schedule. Missing reviews wastes previous effort.
4. Marking Cards as "Known" Too Quickly
Just because you recognize a word doesn't mean you can recall it. Be honest about what you truly know.
5. Only Studying Recognition
Test yourself on production too. Can you use the word in a sentence? Practice output, not just input.
Advanced SRS Techniques
1. Sentence Mining
Extract sentences from content you're consuming (TV shows, books, conversations) and turn them into flashcards.
2. Reverse Cards
Create both directions: target language → your language AND your language → target language.
3. Cloze Deletions
Hide a word in a sentence and try to recall it:
"She's very _____ and plans to start her own company." (ambitious)
4. Image-Only Cards
For concrete nouns, show only an image and recall the word. This builds direct association.
Combining SRS with Other Techniques
Spaced repetition works best when combined with:
- Active conversation practice - Use your flashcard vocabulary in real conversations
- Immersion - Encounter words in natural contexts
- Grammar study - Understand how words fit into sentences
- Output practice - Write and speak using your vocabulary
Conclusion
Spaced repetition is the most efficient way to build long-term vocabulary retention. The key is consistency—15 minutes daily will build thousands of words into permanent memory over months. Use an app that integrates SRS with conversation practice (like OpenQuiz) for the best results.