Video lessons for OCR (MEI) A Level Maths 1.1 Proof, covering 1.1.1 Structure of mathematical proof, 1.1.2 Disproof by counter example, 1.1.3 Proof by contradiction (A-level only), and 1.1 Proof. 3 lessons matched to the OCR (MEI) A Level Maths (H640) specification, each working through the content and then applying it to exam-style questions in Component 01, Component 02 and Component 03 format. Suitable for A Level Maths.