This volume is designed to assist teachers to get the most out of the textbooks or mathematics schemes used in their schools, providing methods of extending the activities offered to learners. The book: is intended to be used explicitly alongside existing material; is a practical guide to methods of exploiting textbook ideas and utilizing different resources; offers ways to analyze the content of existing activities to create alternatives; and shows how adapted activities can provide a varied learning environment to maximize the learning potential of the pupil. This book should be suitable for students on BEd or PGCE courses who intend to teach mathematics in secondary schools. It should also be of interest to secondary mathematics teachers and heads of mathematics who wish to enhance their own practice.