What is it
KS3 algebra covers simplifying expressions, expanding and factorising brackets, and solving linear equations — moving from the concrete number puzzles of KS2 to genuinely abstract manipulation with letters and symbols.
Why it matters
Algebra is the language the rest of secondary and post-16 maths is written in — every GCSE and A-Level topic, from graphs to mechanics, assumes fluent, confident algebraic manipulation.
Exam tip
When expanding double brackets, write out all four multiplications methodically (using FOIL or a grid) rather than trying to do it in your head — rushed mental expansion is where most marks are lost.
Related topics
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