Comprehensively revised and updated, this 2nd Edition is endorsed by WJEC. // Straightforward and concise coverage of the specification, with any additional content clearly highlighted to provide students with stretch and challenge opportunities. // New section on answering exam questions at the end of each unit gives guidance on command words and how to approach each question. // New exam practice questions at the end of each unit are taken from actual WJEC past papers with answers provided in the book. // Increased maths support with maths skills and techniques regularly tested throughout. // Clear explanations and diagrams throughout.