This superb Exam Practice Workbook from CGP is the perfect way to prepare for the Higher Level Grade 9-1 OCR 21st Century GCSE Combined Science exams. It's packed with a wide range of realistic exam-style questions for every topic, including coverage of Working Scientifically and all the required practicals you could be tested on in the new exams. Every question is labelled with a grade range on the new 9-1 scale, so it's easy to focus your practice on the difficulty level that suits you best. Detailed step-by-step answers are available in a separate book (9781782945130). Matching study notes for OCR 21st Century GCSE Combined Science are available in CGP's brilliantly clear Revision Guide - see 9781782945642.