This revision guide is written at the appropriate level for the exam, giving students a clear indication of the level they are expected to achieve. The content covers everything students need to know for the OCR exams, without extra information needed for other exam specifications. Content is organized into bite-sized chunks using double-page spreads to make revision more manageable, with short questions at the end of each spread. Tips on common pitfalls and advice on the best way to tackle different types of exam questions are included, and there are practice exam-style questions at the end of each module. The answers to all questions are in the back of the books, so students can work through at their own pace. The separate guides for AS and A2 are each written at the right level for the appropriate exam, giving students a clear indication of the level examiners will expect them to achieve in their exams. Because the revision guide is written especially for the OCR exams, the content covers everything students need to know for their exams, without additional information needed for other exam specifications.