Written for the Cambridge OCR GCSE Computer Science updated specification (J277) for first teaching from 2020. This print and digital student book has been updated and reordered and uses an exciting and engaging approach to help students build their knowledge and master underlying computing principles and concepts. Designed to develop computational thinking, programming and problem-solving skills, this resource includes challenges and real-life examples that demonstrate how computer science relates to everyday life with practice questions. Our new reflection feature helps students to reflect on their progress and see where they could improve. Answers can be found in the teacher's resource.