Spaced repetition without any apps
Forgetting is not a character flaw. It is the default setting of a healthy brain, and it starts working against you within hours of a study session. The fix is not more hours — it is better spacing.
Most students study a topic hard, feel confident, and never deliberately return to it until the night before the exam. By then the material has quietly drained away, and the panic re-learning begins from close to zero.
The schedule
The day you first learn something properly, open your diary and write four dates. That is the whole system.
- Day 1 — learn it properly, using active recall.
- Day 2 — ten-minute recall test. Blank page, no notes.
- Day 7 — ten-minute recall test.
- Day 21 — ten-minute recall test.
Four short reviews spread out beat one long night, every single time. The intervals widen because each successful recall buys you more time before the next one is needed.
Ten minutes means ten minutesThese reviews are meant to be short. If a review is taking forty minutes, you did not learn it properly on day one — go back rather than turning every review into a fresh study session.
Why write the dates immediately
Because your future self will not remember to. The moment you finish learning a topic is the only moment you reliably know that you learned it. Scheduling the reviews right then removes the decision later, and removing decisions is most of what makes a study system survive.
I ask students to keep this in a paper diary rather than a phone, for one specific reason: opening your phone to check your revision schedule is the most reliable way I know to lose twenty minutes.
When a review goes badly
If you sit down for a day-7 review and can barely produce anything, do not panic and do not skip ahead. Treat that topic as a fresh day 1 and reset its four dates. A failed review is useful information, not a verdict.
Fitting it around school
The reviews are short enough to live in the gaps — a free period, the twenty minutes before dinner, the bus. What matters is that they happen roughly on schedule, not exactly. A day-8 review is fine. A day-30 review is a new day 1.
Students who keep this going for a full term stop having "revision periods" at all, because there is nothing left to cram. That is the actual goal.