Spaced Repetition Schedule — The 1-3-7-14-30 Method and How to Use It
The best spaced repetition schedule: review after 1, 3, 7, 14 and 30 days. What the research says, how to adjust the days, and how to use it for exams.
The best spaced repetition schedule for most students is simple: after learning a topic, test yourself on it after 1 day, 3 days, 7 days, 14 days and 30 days (the 1-3-7-14-30 method). Spacing out reviews like this is one of the best-supported findings in learning research. There is no single proven "perfect" set of days — widen the gaps when a review feels easy and shorten them when it is hard. Here is how to set it up for board exams, JEE and NEET.
Why Your Brain Forgets — The Forgetting Curve
In 1885, psychologist Hermann Ebbinghaus measured how quickly he forgot lists he had learned. Forgetting was fastest in the first hours and days, then slowed down:
| Time after learning | How much of the learning effort was saved when relearning (Ebbinghaus, 1885) |
|---|---|
| 20 minutes | about 58% |
| 1 hour | about 44% |
| 1 day | about 34% |
| 6 days | about 25% |
| 31 days | about 21% |
His lists were meaningless syllables; meaningful material that you understand fades more slowly — but the shape of the curve is the same.
The key insight: each review resets the curve and makes it flatter, so the next review can come later and takes less time. A few short reviews spread over a month keep a chapter fresh far longer than one long session.
The Practical Spaced Repetition Schedule
After studying any new chapter or topic, follow this review schedule:
| Review # | When | Duration | What to Do |
|---|---|---|---|
| 1 | Same evening (before bed) | 10–15 min | Quick recall: write down everything you remember without looking at notes. Then check. |
| 2 | Next day | 10–15 min | Self-test on key concepts, formulas, and facts. Use flashcards if available. |
| 3 | Day 3–4 | 10 min | Quick recall test. Focus only on what you got wrong in Review 2. |
| 4 | Day 7–8 | 10 min | Rapid-fire self-test. If you recall 90%+, move to next interval. If not, review again in 3 days. |
| 5 | Day 14–15 | 5–10 min | Quick formula/key concept check. This should feel easy by now. |
| 6 | Day 30 | 5 min | Final check. If you remember well, this topic is in long-term memory. |
How to Apply Spaced Repetition by Subject
Biology / Social Science (Memorisation-Heavy)
These subjects benefit the MOST from spaced repetition because they require remembering large amounts of factual information:
- Create flashcards for definitions, processes, and key facts (e.g., "What are the 4 chambers of the heart?")
- Draw diagrams from memory during each review — if you can draw it without looking, you know it
- Use mnemonics for lists (e.g., "King Philip Came Over For Good Spaghetti" for taxonomy)
- Review schedule: Follow the standard 1-3-7-14-30 day schedule strictly
Maths / Physics (Problem-Solving)
- Formula flashcards: Create cards with the formula on one side, when to use it on the other
- Revisit solved problems: Instead of re-reading theory, try solving 2–3 problems from the chapter at each interval
- Error log: Keep a list of problems you got wrong. Review these more frequently (shorter intervals).
- Review schedule: 1-2-5-10-20 days — shorter gaps keep problem-solving methods fresh
Chemistry (Mix of Both)
- Inorganic: Flashcards for reactions, properties, exceptions. Standard 1-3-7-14-30 schedule.
- Organic: Practise named reactions and conversions at each interval. Draw mechanisms from memory.
- Physical: Formula flashcards + solve 1–2 numericals at each interval.
Ready-made flashcards for every chapter
Super Tutor has flashcards and practice quizzes for every chapter of your syllabus — the quick self-tests each review needs. Free trial, no card needed.
Start freeSetting Up Your Review Calendar
Here is a simple system using a notebook or spreadsheet:
- Create a table: Rows = chapters/topics. Columns = Review 1, 2, 3, 4, 5, 6 with dates.
- When you finish a chapter: Fill in the review dates based on the schedule (Day 1, 3, 7, 14, 30).
- Each morning: Check which chapters need review today. Do them before starting new material.
- After each review: Rate yourself: Easy (extend interval) / Hard (shorten interval) / Forgot (restart from Day 1).
- Time budget: Reviews take 30–60 minutes per day. New learning takes 3–5 hours. Never skip reviews for new material.
Spaced Repetition vs Other Techniques
| Technique | How useful for long-term memory | Time required | Best for |
|---|---|---|---|
| Cramming (one session) | Low — fades within days | One long session | Last-minute tests only |
| Re-reading | Low (Dunlosky et al., 2013) | High | Feels productive but is not |
| Highlighting | Low (Dunlosky et al., 2013) | Low | Marking text, not remembering it |
| Active recall (self-testing) | High (Dunlosky et al., 2013) | Moderate | Every study session |
| Spaced repetition | High (Dunlosky et al., 2013) | Moderate, spread over time | Year-long exams (boards, entrance) |
| Spaced repetition + active recall | The strongest combination | Moderate | Use this together |
The Bottom Line
For exams that cover a whole year's syllabus, spaced repetition is the most reliable way to keep every chapter fresh. Start from the first chapter of the year, and by exam time you will have reviewed each chapter several times, so final revision becomes a refresher instead of relearning. Half an hour of reviews a day saves weeks of panic cramming later.
Sources: Ebbinghaus (1885) on forgetting; Dunlosky et al. (2013), "Improving Students' Learning With Effective Learning Techniques". Individual results vary.
Put these techniques into practice
Super Tutor turns them into a daily routine — flashcards for active recall, practice quizzes and a study planner matched to your syllabus.
Practise with Super Tutor — start freeFrequently Asked Questions
What is spaced repetition?
Spaced repetition is a study technique where you review material at increasing intervals — for example, after 1 day, then 3 days, then 7 days, then 14 days, then 30 days. Each review strengthens the memory and extends how long you remember it. It is based on the 'forgetting curve' — the scientific finding that memories fade predictably unless refreshed at the right time.
Does spaced repetition really work?
Yes — spreading reviews out over time (the 'spacing effect') is one of the best-supported findings in learning research, and a major review of study techniques (Dunlosky et al., 2013) rated it among the most useful. It works best when each review is a self-test rather than a reread, because retrieving a memory just as it starts to fade strengthens it.
How do I use spaced repetition for board exams?
After studying a chapter: Review it the next day (Day 1), then after 3 days, then after 7 days, then after 14 days, then after 30 days. Use flashcards or quick self-tests for reviews — do not re-read the entire chapter. By the time boards arrive, you will have reviewed each chapter 5–6 times at optimal intervals and remembered nearly everything.
What is the best spaced repetition schedule?
There is no single scientifically proven 'best' schedule. A good rule of thumb is expanding gaps: review after 1 day, 3 days, 7 days, 14 days and 30 days (the popular 1-3-7-14-30 method). Research suggests the best gap depends on how long you need to remember — the further away the exam, the longer the gaps can be. Adjust as you go: if a review feels easy, lengthen the next gap; if you struggled, shorten it.
Is the 1-3-7-30 method the same thing?
Yes — 1-3-7-30 and 1-3-7-14-30 are both versions of expanding-interval review. Adding the 14-day review helps for harder topics. What matters most is that the gaps grow and that you test yourself at each review.
Can I use spaced repetition for Maths and Physics?
Yes, but differently. For Maths/Physics, spaced repetition works best for: formulas (flashcards), problem-solving patterns (revisit solved problems), and concepts (quick recall tests). Instead of re-reading theory, try to solve a problem from each topic at spaced intervals. If you can solve it without looking at notes, you have retained the concept.
Is spaced repetition better than cramming?
Far better for long-term retention. Cramming can get you through a test the next day, but most of it fades within days. For board and entrance exams, which cover a whole year's syllabus, you cannot cram everything in the last week — spaced reviews through the year are what make the final revision manageable.
How many subjects can I use spaced repetition for simultaneously?
All of them. Create a review calendar where different subjects are reviewed on different days. Example: Monday — review Maths chapters from last week + Physics from 2 weeks ago. Tuesday — review Chemistry from last week + Biology from 2 weeks ago. Rotate subjects so you are always reviewing something. It takes 15–30 minutes per subject per review session.
What apps or tools can I use for spaced repetition?
Anki (free on Android and computers — create custom flashcard decks), Quizlet (simpler interface), or, on no budget at all, a physical notebook with a review calendar. Many students use a simple method: write chapter names on index cards, sort them into 'review today', 'review in 3 days', 'review in 7 days' piles. Move cards to longer intervals after each successful review.