This text provides an overview of the teaching and learning of numeracy in primary schools. It presents an accessible guide to current British and Dutch research into numeracy teaching. Leading researchers describe their findings and discuss implications for practising teachers. The projects include studies of effective teacher numeracy and ICT and numeracy, an evaluation of international primary textbooks, assessment, using and applying mathematics, and family numeracy. The book also includes chapters on pedagogy, focusing on the teaching of mental calculation, the transition from mental to written algorithms, the place of the empty number line, and the use of the calculator as a teaching aid.