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

A complete, ready-to-teach OCR A-level Maths (H240) lesson on proof, for Pure Year 1. Students learn what makes a valid proof, prove results by deduction and by exhaustion, disprove statements with counter-examples, and use the implication symbols correctly. Built for teachers and tutors who want fully modelled lessons without hours of preparation. Covers OCR specification 1.01a, 1.01c.
Topics covered:
• Understand the structure of a proof: assumptions, logical steps, conclusion
• Prove statements by deduction, using algebra
• Prove statements by exhaustion, checking every case
• Disprove statements with a counter-example, and use ⇒, ⇐ and ⇔
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 (21 questions, 47 marks: AO1 16, AO2 17, AO3 14) with a separate answer copy; printable exit tickets.