GCSE Maths revision: what to focus on in the final weeks (2026)

GCSE Maths exams typically run in May and June. If your child has three to four weeks left and is still not confident, this guide covers exactly where to focus — not everything, but the topics and techniques that will move the grade most in the time remaining.

The honest truth about last-minute revision: you can't learn everything in three weeks. What you can do is close the gaps on the highest-mark topics, sharpen exam technique, and stop losing marks on questions your child already knows how to do.

Where the most marks are in GCSE Maths

GCSE Maths is worth 240 marks across three papers (one non-calculator, two calculator). The topics with the highest mark allocation across all boards are:

• Algebra — solving equations, rearranging formulae, quadratics, sequences (typically 25–30% of marks)
• Ratio, proportion and rates of change — percentage change, direct and inverse proportion (15–20%)
• Geometry and measures — area, volume, angles, Pythagoras, trigonometry (20–25%)
• Statistics and probability — averages, box plots, frequency tables (10–15%)
• Number — fractions, decimals, powers, standard form (10–15%)

If your child has three weeks, prioritise algebra and ratio first. These topics appear on every paper, every year, and losing marks here costs more than losing marks anywhere else.

Past papers are the most important thing

No revision activity is more effective than doing past papers under timed conditions and then marking them properly. The reason is simple: the best revision is practice at the thing you're actually going to do.

For GCSE Maths:

• Download past papers from the exam board directly: AQA, Edexcel, OCR, WJEC and SQA all publish free PDFs with mark schemes
• Do the paper in full, under timed conditions (1 hour 30 minutes)
• Mark it against the mark scheme immediately — don't wait
• Go back through every question your child got wrong and understand why
• The mistake is almost always one of three things: a misread question, a procedural error they know how to fix, or a gap in a specific topic

Two past papers per week is a realistic target. That means working through six papers in three weeks — enough to see patterns in where marks are being lost.

Teach mark scheme literacy

Most students lose marks not because they don't know the maths, but because they don't know what the examiner is looking for. GCSE Maths mark schemes give credit for method marks even when the final answer is wrong. That means a student who shows their working can score 2 out of 3 on a question they get wrong — but a student who writes only an answer and gets it wrong scores nothing.

The rules to drill before the exam:

• Always show working, even for “simple” calculations
• Write the formula before substituting values
• On multi-step problems, write down each step separately
• Never leave a question blank — attempt every part, even if uncertain
• Check units are included in any answer that requires them

The topics most students drop marks on

Based on examiners' reports across AQA, Edexcel and OCR, the topics where students most commonly lose easy marks are:

• Rearranging formulae. Especially when a letter appears twice. Practice with past paper questions specifically on this.
• Percentage change (reverse percentages). “A price was reduced by 20% to £80. What was the original price?” — a reliable source of dropped marks.
• Trigonometry (SOHCAHTOA). Students often know the formulae but misidentify which sides are opposite and adjacent. Draw the triangle first, always.
• Simultaneous equations. The method is learnable in two sessions with practice. Most students who get these wrong have simply not practised enough.
• Probability (combined events). Tree diagrams and Venn diagrams — both appear every year, both are straightforward once the method is understood.
• Standard form. Calculator use with standard form catches many students out on Paper 2 and 3. Practise the actual button sequences on the calculator they will use in the exam.

Prepare specifically for Paper 1 (non-calculator)

Many students are weaker on the non-calculator paper because they rely on their calculator for arithmetic they should be able to do mentally. Paper 1 is where students from grade 4 to grade 6 often separate.

Focus for Paper 1:

• Mental multiplication — know times tables to 12 × 12 fluently
• Long multiplication and division by hand
• Fraction arithmetic without a calculator (adding, subtracting, multiplying, dividing)
• Estimating answers before calculating — useful for checking
• Surds and indices (higher tier)

Should you get a tutor this late?

Yes — but be realistic about what three or four sessions can achieve. A good Maths tutor in the weeks before the exam is valuable specifically because they can diagnose exactly where marks are being lost and target those areas directly. That is much more efficient than unfocused revision.

A tutor can look at three or four past papers, identify the recurring gaps, and spend the remaining sessions closing those specific gaps rather than working through the entire curriculum again. That targeted approach is why last-minute tutoring can still make a meaningful difference.

You can find Maths tutors in London, Manchester, Birmingham and other UK cities on TutorLab, with rates visible before you make contact. Many offer online sessions and can start this week.

Browse all Maths tutors →

The day before the exam

No new topics. The day before an exam should be:

• A short review of the formula sheet (and which formulae are not given — these need to be memorised)
• A quick run through one paper from a couple of months ago to build confidence, not stress
• A normal evening — food, sleep, no late-night cramming

Memory consolidation happens during sleep. A student who revises until midnight and sleeps five hours will perform worse than one who stops at 9pm and sleeps eight.