Spaced Repetition Schedule for Exam Revision: 1, 3, 7, 14, 30

Quick answer: A spaced repetition schedule for exam revision means testing yourself on the same fact on day 1, day 3, day 7, day 14 and day 30 after you first learn it, stretching the gap each time you get it right. Five short recalls spread across a month beat five hours of rereading the night before.

I am doing IGCSE and A-Levels right now, and I ignored this for two years. History is my favourite subject and English is my strongest, so I told myself flashcards were for people memorising vocabulary. Then I got 11 out of 25 on a chemistry test I had genuinely revised for. I had read the electrolysis notes four times in one evening and never once closed the book to write a half-equation from memory. That is the entire difference, and the schedule below is what I use now.

The schedule: day 1, 3, 7, 14, 30

The standard interval set is 1, 3, 7, 14 and 30 days after first learning something, then roughly every two months. Each gap lands just before the fact would slip away, because recall that takes effort is what strengthens the memory. Review too soon and it is easy and does nothing. Review too late and you are relearning from scratch.

Two adjustments worth knowing. Slippery material like formulas and dates starts tighter: 1, 2, 4, 7, 14, 30. Material you already half-know can skip day 1 and start at day 3.

The exact numbers are not sacred. Days 2, 5, 9 and 20 gets almost the same result. What matters is that the gaps exist and that they widen.

A worked example: 12 half-equations

Say you learn 12 electrolysis half-equations on a Monday. Call that day 0.

• Day 1 is Tuesday
• Day 3 is Thursday
• Day 7 is the following Monday
• Day 14 is the Monday after that
• Day 30 is a Wednesday, four weeks and two days on

Each review means covering the answer, writing the equation out on paper, then checking. On my first review I usually get about 8 of 12. Second review, 10. By day 14 it is 12 out of 12 in under two minutes.

Here is the rule most people skip: the four you keep getting wrong go back to day 1 and restart the cycle, and only those four. You never restart the whole set. Your weakest cards end up seen five or six times as often as your strongest, which is exactly what a cram session cannot do. If the chemistry itself is the problem rather than the memorising, the chemistry hub beats making more cards.

The daily load, in actual minutes

At five new cards a day, a full spaced repetition schedule costs about four minutes a day. The arithmetic surprises people, so here it is.

Once the system is running, on any given day you review the batches from 1, 3, 7, 14 and 30 days ago. Five batches of five is 25 reviews, plus your 5 new cards. Thirty cards. At roughly 8 seconds each, that is 240 seconds.

Scale it up. Two hundred cards across a term, each recalled five times, is 1,000 recalls, or about 2 hours 15 minutes of total work for a term's core content. Most people spend longer than that in one panicked evening in May.

If tracking due dates on paper annoys you, Flashcards schedules each card and shows you only what is due today.

The paper version: three envelopes

You can run spaced repetition with index cards and three envelopes labelled Daily, Every 3 Days and Weekly. No app, no account, no setup evening.

1. Every new card goes into Envelope 1.
2. Review Envelope 1 daily, Envelope 2 on Mondays and Thursdays, Envelope 3 on Sundays.
3. Get a card right and it moves up one envelope. Get it wrong and it goes straight back to Envelope 1, whichever envelope it came from.
4. Once a card has survived Envelope 3 twice, retire it to a done pile and check that pile monthly.

That demotion rule in step 3 is what makes the whole thing work. Your hardest 10 percent of cards get seen roughly ten times as often as your easiest, and you never have to sit there deciding what to revise. The envelopes decide.

What actually goes on a card

One question, one answer, phrased the way the exam phrases it. That is the whole standard.

Cards that work:

• Define isotope (2 marks). Back: atoms of the same element with the same number of protons but a different number of neutrons.
• Sine rule, when do you use it? Back: when you have a side and the angle opposite it.
• One economic cause of the Wall Street Crash, plus a supporting detail.

Cards that do not work:

• The French Revolution. That is a chapter, not a card.
• Photosynthesis equation, with a paragraph of context on the back.

Two specifics pushed my marks up most. First, put the mark allocation on the front: a 2-mark definition needs two scoring elements, and if your answer only ever has one you will not notice unless the card tells you. Second, use the command word. Cambridge, AQA, Edexcel, OCR, CBSE, AP and WAEC all mark against command words, and a card saying explain why trains a different answer from one saying state. If turning notes into question-shaped cards is the bottleneck, Quiz does that conversion in seconds.

When the schedule breaks

Never restart from zero, and compress rather than abandon. That is the whole recovery plan.

Missed a week? Do today's due cards, treat everything overdue as simply due now, and clear the backlog over three or four days. The schedule is a guide, not a debt you owe.

Exam in 10 days and you have not started? Compress the same shape into the time you have: day 1, 2, 4, 7, 10. You will get maybe 70 percent of the benefit, which is still far more than rereading.

Exam in three days? Do not build a system. A mock exam under timed conditions is worth more at that point than any deck. Spaced repetition is something you start eight weeks out, not three days out, and being honest about that has saved me a lot of wasted evenings.

Mistakes I made

• Making cards for things I already knew, because getting them right felt nice.
• Reading the front and back together. That is rereading with extra admin.
• Putting three facts on one card. Split them. Every time.
• Re-drilling a card I had failed four times instead of rewriting it. A card that keeps failing is usually badly written, not proof your brain is broken.
• Building a beautiful colour-coded system in September and opening it twice.

Test yourself

1. Your review days are 1, 3, 7, 14 and 30. You learn a topic on a Thursday. Which day of the week is your day-7 review?
2. In the three-envelope system, where does a card go when you get it wrong in Envelope 3?
3. You add 5 new cards a day and follow the 1, 3, 7, 14, 30 schedule. Roughly how many cards do you review on a typical steady-state day?

FAQ

How long should a daily review session be?

Ten minutes or less for most students. If sessions creep past 20 minutes every day, you are adding new cards faster than you can maintain the old ones. Cap new cards at 5 to 10 a day and the load stays flat.

Does spaced repetition work for essay subjects like history and English?

Yes, but not for the essay itself. Use it for the raw material: dates, statistics, quotations, named examples, definitions of key terms. You build the argument in the exam room and memorise the ammunition beforehand. Almost all my history cards are one statistic plus what it proves.

Should I make my own cards or use ready-made decks?

Make your own wherever you can. Turning a page of notes into a question is half the learning, and it forces you to notice what you cannot actually explain. Ready-made decks are fine for pure vocabulary and formulas.

What if I miss several days in a row?

Do today's due cards first, then clear the backlog across three or four days rather than in one heroic sitting. Do not delete the deck and start again. That instinct has cost me more revision time than every missed week combined.

In short

A spaced repetition schedule for exam revision is five short recalls per fact on days 1, 3, 7, 14 and 30, with any card you fail dropping straight back to the start. It costs about four minutes a day at five new cards a day, runs perfectly well on index cards and three envelopes, and asks one real thing of you: close the book before you answer. Start eight weeks out and the exam genuinely feels easier.