Revise smart and save! This Revision Guide delivers hassle-free exam preparation for Unit 1 and closely matches the AQA specification. One key skill or technique is covered on each page. Putting it into Practice sections show you how to apply these skills to full-length exam-style questions. Exam Alerts highlight common pitfalls and misconceptions. With one-to-one page correspondence between this Guide and the companion Workbook, this hugely popular Revision series offers the best value available for GCSE students.