The essential subject knowledge text for primary mathematics. Secure subject knowledge and understanding is the foundation of confident, creative and effective teaching. This comprehensive text includes interactive tasks, a self assessment section to allow trainees to better understand their level of knowledge and M level extension boxes to provide further challenge in all chapters. With full coverage of the mathematics curriculum, and updated research summaries reflecting the latest thinking, this text is written to help trainee primary teachers develop and consolidate their knowledge of mathematics. The 6th edition of this popular book features detailed links to the 2012 Teachers' Standards.