What is number sense? How does children's number sense develop? What are the most effective teaching methods and resources? How can research findings inform classroom practice? The fully revised second edition of the best-selling "Teaching Number Sense" is the book to help you answer these questions, and more. This new edition boasts a new chapter on 'The empty number line' as well as a wealth of material on all the latest trends and innovations in mathematics teaching to support children's learning. It is a specialist text that uses a balance of theory and practice to help teachers deal with the problems and issues they will encounter in mathematics teaching, including examples for use specifically in the classroom. This book will prove essential reading for trainee and established mathematics teachers alike.