s been developed from extensive research through lesson observations, interviews and work with our research community (the Cambridge Panel) to meet specific needs. Activities and questions develop students' essential science skills. Accessible language and features support English as a second language learners. Exam-style questions build student confidence. Projects provide opportunities for assessment for learning, cross-curricular learning and developing skills for life. There are multiple opportunities to engage in active learning, such as discussions and debates, and self-assessment and reflection activities. Answers for all questions and exercises can be found online at www.cambridge.org/go.