"Revise it twice" is the most common instruction given to Indian school students, and it is also the vaguest. Twice when? Twice how? Twice starting from the day it was taught, or twice in the week before the test, which is what usually happens?
The number that works is six, spread across thirty days, each session short. That sounds like more work than most families do now. In total time it is considerably less, because nothing has to be re-learned from scratch.
The schedule
Once a chapter has been taught in school and your child has understood it, count from that day:
- Day 3: write from memory. Key points, definitions, one or two worked problems, book closed.
- Day 5: read through. Notes or textbook, ten minutes, no pressure.
- Day 10: write from memory again. This one usually exposes what did not stick the first time.
- Day 15: read through.
- Day 21: write from memory.
- Day 30: a final read-through.
Six sessions. The written ones take fifteen to twenty minutes, the read-throughs around ten. That is roughly ninety minutes spread across a month, for a chapter that would otherwise eat a whole evening of panic in exam week. The reasoning behind the spacing is in what is spaced revision.
Why the write sessions carry the weight
Three of the six ask your child to produce the chapter from memory rather than look at it. That is deliberate, and it is the part most students skip because it is uncomfortable.
Reading a chapter again feels productive and is almost effortless. Writing it out from a blank page is slower, more annoying, and far more useful, because it is the only version that tells you what your child actually knows without the book propping them up.
A practical way to run a write session: ask for the chapter's key points from memory, then open the book and have your child mark what they missed in a different colour. Those marks are the real revision list for next time.
If a revision session feels easy, it is probably not doing much. The small struggle of recalling something is what makes it stay.
What about a chapter the child did not understand well?
Then it is not ready for revision. Revision strengthens something that exists. If the chapter never landed, the first step is to re-learn it, not to review it, and the signals for that are in how to know if your child truly understood today's lesson.
Teach it again or get it taught, check understanding properly, then start the thirty days from that day.
Missed sessions, and what to do
Sessions will be missed. Exams, illness, a wedding, a week where nothing goes to plan.
The rule that keeps this workable: never drop a session, just shift it. A Day 10 session done on Day 12 is almost as good. A Day 10 session abandoned because it is "too late now" is the start of the slide back into cramming.
If several pile up, do the write sessions first and skip a read-through. The read-throughs are the expendable ones.
When a chapter is done
After the Day 30 session, if your child can write the key points and solve a typical problem without the book, that chapter is in long-term memory. Mark it finished and stop revising it. It will need one more pass before the final exams, and that pass will take fifteen minutes rather than an evening.
That is the whole point of the method: not perpetual revision, but a chapter that reaches a settled state and stays there.
The part that actually breaks
The schedule is easy. The bookkeeping is not.
Ten subjects, each with ten to fifteen chapters, each chapter taught on a different day, each with six sessions due on different dates. That is several hundred dates across a school year. No parent tracks that in a diary for more than a few weeks, which is why most families start spaced revision in June and quietly stop by August.
So the honest advice is this: do not try to hold the calendar in your head. Write the six dates on the chapter's first page the day it is taught, keep one list of what is due this week, or hand the scheduling to something that does it for you. The method is only as good as the system remembering it.
What you are aiming for is an evening where your child asks what is due today, and the answer takes two seconds to find. Everything else about revision is already solved.