Reactive Science is a new resource for double-award science GCSE. It is ideal for use with AQA or OCR specifications and is cost-effective with just one book covering both years, helping you to properly resource on a limited budget. Reactive Science covers both foundation and higher tier. Material for higher tier students is clearly differentiated, and placed alongside the relevant foundation tier material. This allows continuity of coverage and helps you to manage the demands of mixed-ability teaching. Knowledge required from key stage 3 is summarised; new ideas are explained clearly, with concepts getting progressively more difficult; and higher tier material provides opportunities for extension.