Spaced Repetition for Exam Preparation: A Simple Schedule

The short answer: review each item shortly after you learn it, again after a few days, again after a week or so and then at longer gaps. Test yourself before you look at the answer. A simple 1-3-7-21 day schedule, applied to your error log and short notes, is enough for most exams.

The idea behind it

Memory fades after learning, and each retrieval slows the fading. Reviewing material just as you are about to forget it is more efficient than rereading it all repeatedly or cramming it once. This pattern, studied by psychologists for more than a century as the spacing effect, is well established in research on memory. You do not need software or any special method to benefit; a calendar and a set of cards or a notebook is enough.

What to put into a spaced schedule

• Facts and formulas you forget: formulas, definitions, dates, laws and rules.
• Methods and traps from your error log.
• Vocabulary with the sentence where you found each word. See vocabulary building.
• Current affairs and static GK items, kept short. See general awareness without burnout.

Do not schedule things you already know well or things that are better practised than recalled, such as long calculations: for those, solve fresh questions.

A simple schedule: 1, 3, 7, 21

If you miss an item at any review, return it to the one-day step. This is the key rule: forgetting resets the clock.

How to make the items

Write each as a question on one side and the answer on the other, on paper cards or in a document. Examples:

• Q: Formula for the sum of the first n natural numbers? A: n(n + 1) ÷ 2.
• Q: When two workers take a and b days, together they take? A: ab ÷ (a + b) days.
• Q: Trap in successive percentage change? A: Do not add percentages; multiply the factors.

Keep each card to a single fact or idea; two facts per card makes it unclear what you forgot.

A worked example of a week

Suppose you add six new items on Monday. They come up again on Tuesday (1 day), Thursday (3 days) and the following Monday (7 days), and then 21 days after the start. If you add six items a day, by the end of the third week you will have about 20 to 30 reviews a day, five to ten minutes of work. If the pile grows past about 40 a day, reduce the number of new items or drop cards you always get right. The point of the schedule is that daily work stays small.

Fit it around mock tests

1. After each mock, add the formulas, facts and traps from your errors to the schedule. See how to build an error log.
2. Do the day's review at the start of a study session, when you are fresh.
3. In the last two weeks, focus reviews on items you have missed more than once.

Retrieval, not rereading

The benefit comes from trying to recall before you check. Cover the answer, answer aloud or on paper and then compare. A quick glance at a page of notes feels productive but gives far less benefit. Rereading is fine as a first pass; spaced retrieval is what builds durable memory.

What spaced repetition cannot do

• It does not teach you a method; use it after you understand.
• It does not replace practice with timed questions.
• It is not magic: gaps and numbers are guidelines, and you can adjust them to your own forgetting.

Common mistakes

• Making too many cards and falling behind.
• Putting several facts on one card.
• Skipping days and returning to a huge pile.
• Reviewing by reading, not recalling.
• Memorising items you do not understand.

Combine this with short notes and the 30-day mock test plan, and test the effect with a timed practice test.