With secure subject knowledge and understanding, trainees develop confidence and authority, and are better equipped to become effective and creative teachers. Written specifically to help trainee primary teachers develop their maths subject knowledge, this new third edition has been completely revised and updated to match the new QTS Standards, and reflects the latest thinking from the Primary National Strategy and other new initiatives. Popular, existing features are joined by new reflective tasks and "Moving On" sections that help trainees to develop the information in each chapter.