Mathematics
Year 9 · Curriculum for Wales
Year 9 completes Key Stage 3 and in most Welsh schools begins the GCSE course. Algebra extends to quadratic expressions, simultaneous equations, rearranging formulae and quadratic graphs, and pupils meet trigonometry in right-angled triangles.
Number work covers surds, index laws including negative and fractional indices, bounds and compound measures. Geometry covers circle theorems in some schemes, similarity and congruence, and vectors.
Tier decisions, Foundation or Higher, are typically made during or at the end of this year, which makes focused support here unusually consequential.
Curriculum Breakdown
Important Topics
- Advanced AlgebraQuadratic expressions, simultaneous equations and rearranging formulae.
- GraphsQuadratic and reciprocal graphs, gradient, intercept and real-life graphs.
- Trigonometry & PythagorasSine, cosine and tangent in right-angled triangles and 3D applications.
- NumberSurds, index laws, bounds, standard form and compound measures.
- GeometrySimilarity, congruence, circle properties, vectors and transformations.
- Statistics & ProbabilityCumulative frequency, box plots, tree diagrams and conditional probability.
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