Book excerpt: Study as you go with Cambridge Checkpoints. Updated annually to provide the most up-to-date exam preparation available, Cambridge Checkpoints provides everything you need to prepare for your exams in a go-anywhere format that fits easily into your school bag. • Recent official exam papers with suggested responses • Hundreds of additional past exam and exam-style questions with answers • Dot point summaries of key topics and concepts to help you pinpoint where you need further revision