Revision workbook with answers for a key GCSE Maths topic Our GCSE Topics revision guides cover GCSE exam topics at greater depth, with clear and focused explanations of tricky topics and questions that offer additional challenge. Taking an active, stepped approach, our guides include popular 'It!' features giving students opportunities to self-test their understanding and apply their knowledge as they study. Snap it! Read it, snap it on your phone, revise it...helps you retain key facts Nail it! Examiner tips to help you get better grades Stretch it! Support for the really tough stuff that will get you higher grades The content of this book was derived from GCSE Grades 9-1: Maths Higher Revision Guide for Edexcel   The accompanying Scholastic GCSE app helps you revise on-the-go: Use the free, personalised digital revision planner and get stuck into the quick tests to check your understanding Download our free revision cards which you can save to your phone to help you revise on the go Implement 'active' revision techniques - giving you lots of tips and tricks to help the knowledge sink in 'What they thought was especially clever is the resources 'knowing' the day of their exam, and then highlighting what they needed to do and when in the days and weeks leading up to it. That captured them there and then.' Dave Richardson, Deputy Head [Regarding the GCSE 9-1 Scholastic Revision app]