The idea in plain terms
You forget most new information quickly, but each time you retrieve it, you forget more slowly. Spaced repetition exploits this: review something just as it's fading, and the gap before you need to review it again gets longer. The result is much less total study time for the same retention.
A simple schedule
| Review | When | How long |
|---|---|---|
| 1st | Same day or the next day | 10 minutes of recall |
| 2nd | About 3 days later | 10 minutes |
| 3rd | About 1 week later | 10 to 15 minutes |
| 4th | About 2 weeks later | 15 minutes plus practice questions |
| 5th | About 1 month later | 10 minutes, only if needed |
These are rules of thumb, not laws. If a review shows you've forgotten most of a topic, treat it as new and restart the intervals.
A worked example
You learn the causes of the First World War on Monday. Your schedule looks like this:
| Date | Task |
|---|---|
| Mon | Learn the topic (45 min), then 10 minutes of recall from memory |
| Thu | Recall quiz, 10 minutes. Note what you forgot |
| Next Mon | Recall again, then mix with a related topic |
| Two weeks later | Practice essay question, 15 minutes |
| Before the exam | Final skim of notes you missed |
Spaced repetition for different goals
- Exams in a few weeks: compress the intervals: day 1, 2, 5, 10.
- Long-term learning: stretch them to months.
- Vocabulary or facts: use flashcards that handle the intervals for you.
- Problem-solving subjects: redo problems you got wrong instead of re-reading solutions.
The step most people skip: scheduling
The method fails when reviews live only in your head. Put each review on a calendar as a short block with the topic named. If you miss one, move it rather than skipping it. Fuidzy's timeline makes that easy: drag the review forward, and it won't let you double-book the slot.
Build your own schedule in a calendar
- When you learn something new, create a review event for 1 day later, 3 days later, 1 week later and 2 weeks later.
- Name each event with the topic and the review number: "Review 2: photosynthesis".
- Keep each to 10 minutes so it's easy to do.
- When you finish a review, drag the next one out if it went well, or shorten the gap if it didn't.
Planning this on a real timeline is easier than reading about it.
Try the free planner →What to review with
| Material | Best format |
|---|---|
| Facts and vocabulary | Flashcards |
| Concepts | Blank-page recall or explaining aloud |
| Problem-solving | Redo problems you previously got wrong |
| Essays | Re-plan essay outlines from memory |
Compressing the schedule for finals
If you only have two weeks, shorten the gaps: day 1, day 2, day 4, day 8, then once more before the exam. You get fewer reviews, but the idea still holds: revisit just before you'd forget.
Mistakes to avoid
- Reviewing everything every day, which is exhausting and inefficient.
- Skipping the scheduling and hoping you'll remember to review.
- Treating the intervals as fixed when a review shows you forgot a lot.
- Reviewing by re-reading instead of recalling.
Where Fuidzy helps
Fuidzy quietly resurfaces tasks shortly before you'd forget them, which is the same principle as spaced repetition, and it sits on the same timeline as your lectures and deadlines. For card-based memorisation, pair it with a flashcard app; use Fuidzy for the schedule.