GCSE Maths Exam Technique — The 10 Rules

1. Read the question twice before starting

The single highest-return technique. GCSE maths questions frequently include a subtle constraint on the second line — "in its simplest form", "to 3 significant figures", "showing all working". Missing it costs 1-2 marks. Doing it right costs 10 seconds.

2. Show working, always

On Higher tier, "correct answer only" typically scores full marks on a 1-mark question and partial credit on multi-mark questions — but only if working is shown. On multi-mark questions with wrong answers, working can rescue 60-80% of the marks. No working, wrong answer = zero.

3. Never leave a question blank

An attempted answer that's wrong scores the same as a blank one — but an attempt with plausible working often scores 1-2 method marks. Zero attempts, zero marks. Write something for every question, even if it's just labelling what the question is asking.

4. Time budget: roughly 1 minute per mark

90 minutes, 80 marks — so ~1 minute per mark, with slack for reading and checking. If a 4-mark question has taken 8 minutes and you're not close, move on. Come back if there's time.

5. Skip and return

The paper isn't ordered from easy to hard within topics. If a question is jamming, move on and come back. Time pressure on later, easier questions costs more marks than the one hard question ever would.

6. Non-calculator paper: estimate first

Before doing any complex arithmetic, roughly estimate the answer. If your careful calculation gives an answer wildly different from the estimate, you've made an error — check before moving on.

7. Calculator paper: use it fully

The calculator paper is titled that way for a reason. Use fraction mode, use the memory buttons, use table mode for iteration questions. Students who solve calculator-paper questions by hand out of habit waste 15+ minutes across the paper.

8. Draw diagrams for geometry and word problems

If a question describes a triangle, a room, a journey — draw it. Even a rough sketch reduces error rate dramatically. Examiners award method marks for correctly drawn diagrams even when the numeric answer is wrong.

9. Units matter

"Give your answer in cm" vs "in metres". Angle in degrees vs radians. mph vs km/h. Losing marks on unit conversion is one of the most common Higher-tier errors. Underline the required unit as you read the question.

10. Check the final 10 minutes are not wasted

Most students finish 5-15 minutes early. The tempting thing is to sit and stare. The valuable thing is to go back to any question you weren't 100% sure of and check the arithmetic, check the units, check the answer against the question's constraints. This alone can add 5-8 marks in an exam.

How to actually build these habits

Not by reading them. By doing 6-8 full past papers over the term before the exam, with a tutor or parent watching how the paper is approached — not just the score at the end. Habits form under observation; they don't form from good intentions.