Following the 2011 AQA GCSE Science specifications, this revision guide uses an accessible and concise approach to recap the essential knowledge you need to succeed in your course. Following the 2011 AQA GCSE Science specifications, this Revision Guide uses an accessible and concise approach to recap the essential knowledge students need to succeed. A checklist at the end of each unit clearly lists what students need to know and breaks revision down into manageable sections, while practice questions and study tips help prepare students for theexams. Mathematical skills that are needed for the exams are highlighted and supported with short, visual explanations.