OCR A-level Maths: Circles (Pure Year 1) – Complete Lesson Pack

A complete, ready-to-teach OCR A-level Maths (H240) lesson on circles, for Pure Year 1. Students read and write circle equations, complete the square to find the centre and radius, and use the three circle properties to find tangents, chords and the circle through three points. Built for teachers and tutors who want fully modelled lessons without hours of preparation. Covers OCR specification 1.03d, 1.03e, 1.03f.
Topics covered:
• Use (x - a)² + (y - b)² = r² to find the centre and radius, and to write equations
• Complete the square to find the centre and radius from expanded form
• Use circle properties: tangent and radius, chords, and the angle in a semicircle
• Find tangents, where lines meet circles, and the circle through three points
What’s included: annotated PowerPoint with click-by-click I do / We do modelling and speaker notes (plus a PDF); Bronze, Silver and Gold exam-style worksheet with full worked answers; two A5 student help cards; a two-page teacher guide with OCR spec links, timings and misconceptions; double-sided homework (20 questions, 49 marks: AO1 23, AO2 12, AO3 14) with a separate answer copy; printable exit tickets.