How to Revise with the 80/20 Method
You cannot revise everything equally and still go deep. Here is how to find the vital 20% of content that earns most of the marks, and how to drill it.
The principle
Roughly 80% of your marks come from around 20% of the content: a small set of high tariff topics and skills that appear again and again. Spreading your effort evenly across the whole specification feels productive but is the slowest route to a top grade. Find the vital few first.
Find your vital 20%
Work from evidence, not feel. Your specification and past papers tell you exactly what is rewarded.
- — List every topic on the specification, then mark which appear most often in past papers and carry the most marks.
- — Cross reference with the mark scheme to see which skills (evaluation, application, calculation) are rewarded.
- — Be honest about your weak high value topics: those are your highest return targets.
Drill it the right way
Re-reading notes is the least effective revision there is. Active recall and spaced practice are the most effective. Test yourself, get it wrong, correct it, and return to it after a gap.
- — Active recall: close the book and write or say everything you know, then check.
- — Spaced repetition: revisit a topic after a day, then a few days, then a week.
- — Past papers under timed conditions, marked against the real scheme.
- — Interleaving: mix topics rather than blocking one for hours.
Make it measurable
Benchmark against real standards. Mark your timed answers with the actual mark scheme so you can see the gap closing, rather than hoping it is. Measured progress is far more motivating, and far more reliable, than time spent.
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