Key Stage 3 (Years 7–9) does not have a national exam, which is exactly why it gets neglected — there is no fixed date forcing revision, and no result to react to. But KS3 is where the foundations for every GCSE grade get built, in Maths, Science and English alike. Here is what each subject actually covers at KS3, and how they fit together.
- Years covered 7, 8 and 9
- Set by DfE statutory National Curriculum
- Exam None — assessed internally by your school
- Purpose Builds the foundation for GCSE, which starts at Key Stage 4
Why there's no KS3 exam — and why that matters
Key Stage 3 is set out in the DfE's statutory National Curriculum, which every local-authority-maintained school in England must teach. Unlike GCSE, there is no external national exam — your own school assesses progress internally, through tests, essays and teacher assessment, usually building towards GCSE.
The absence of an exam is not the same as the content not mattering. GCSE Maths, English and Science all assume KS3 content is already secure — a shaky grasp of KS3 algebra or KS3 grammar shows up as lost marks two or three years later, at a point where there is far less time to fix it.
KS3 Maths
Six strands, covering the foundations GCSE Maths depends on:
- Number — place value, negative numbers, fractions, decimals and percentages, primes and factors, standard form.
- Algebra — notation, simplifying and rearranging expressions, solving linear equations, coordinates, straight-line and quadratic graphs, sequences.
- Ratio, proportion and rates of change — unit conversion, scale, ratio, percentage change, direct and inverse proportion, compound units like speed and density.
- Geometry and measures — perimeter, area, volume, angle facts, transformations, congruence, Pythagoras' theorem and basic (right-angled-triangle-only) trigonometry.
- Probability — the probability scale, sample spaces, Venn diagrams.
- Statistics — averages and spread, charts and graphs, scatter graphs and correlation.
KS3 deliberately stops short of GCSE-only content — surds, the quadratic formula, the sine and cosine rules and conditional probability all wait until Key Stage 4.
KS3 Science
All three sciences, at KS3 depth:
- Biology — cells and organisation, skeletal and muscular systems, nutrition and digestion, gas exchange, reproduction, photosynthesis and respiration, ecosystems, genetics and evolution.
- Chemistry — the particulate nature of matter, atoms, elements and compounds, pure and impure substances, chemical reactions, the periodic table, materials, Earth and atmosphere.
- Physics — energy costs and transfers, forces and motion, pressure, waves and light, electricity and magnetism, the particle model of matter, space physics.
Again, KS3 stops short of GCSE-only content — moles and stoichiometry, detailed electrolysis, circuit-law calculations and hormone-level biology are Key Stage 4 topics.
KS3 English
Reading, writing and language skills that GCSE English Language and Literature both build on:
- Reading — comprehension of fiction and non-fiction, inference, summarising, comparing texts.
- Grammar and punctuation — word classes, sentence types, clauses, the full range of punctuation.
- Spelling and vocabulary — common spelling patterns, homophones, word roots.
- Language and literary techniques — metaphor, simile, personification, alliteration, tone and register, how writers create effects.
- Writing — composing for different purposes and audiences, planning and structuring longer pieces.
KS3 English does not use prescribed set texts the way GCSE English Literature does — it builds the reading and writing skills GCSE later applies to specific texts and formal essay structures.
Practise all three subjects, free. PassNova's KS3 Maths, Science and English each have their own free question bank with worked explanations — no sign-up needed.
How to use KS3 revision time well
- Treat it as GCSE preparation, not a separate thing. The strands and skills at KS3 are the same ones GCSE tests, just at an earlier depth — practice now genuinely reduces the GCSE workload later.
- Fix gaps as they appear, not at the end of Year 9. Because there is no exam pressure, gaps in KS3 knowledge tend to get carried forward silently. A quick topic-by-topic check across all three subjects surfaces them early.
- Use topic practice, then move to mixed sets. Once a strand feels solid, timed mixed practice checks whether you can apply it under the kind of pressure GCSE exams bring.
Frequently asked questions
Is there an exam for KS3?
No — Key Stage 3 is assessed by your own school through internal tests and teacher assessment, not a national exam, in Maths, Science and English alike.
How is KS3 different from GCSE?
KS3 covers similar broad strands to GCSE but at an earlier, more accessible depth. Each subject holds back its hardest content for Key Stage 4 — for example GCSE-only quadratics and trigonometry in Maths, moles and stoichiometry in Science, and prescribed set texts in English.
Should I focus on one subject or all three?
All three, if you can — Maths, Science and English GCSEs are each independently required for teaching, nursing, apprenticeships and most further study routes, so a gap in any one of them limits options later regardless of how strong the other two are.
One point of clarity: PassNova is a practice and revision site — KS3 has no exam to book, so there is nothing to sit through us or anyone else. Content here is written from the DfE's statutory National Curriculum, checked in September 2026.