Video lessons for OCR A Level Maths 1.1 Proof, covering 1.1.1 Structure of mathematical proof, 1.1.2 Logical connectives, 1.1.3 Disproof by counter example, 1.1.4 Proof by contradiction (A-level only), and 1.1 Proof. 3 lessons matched to the OCR A Level Maths (H240) specification, each working through the content and then applying it to exam-style questions in Paper 1, Paper 2 and Paper 3 format. Suitable for A Level Maths.