Arranged in four sections, this collection of articles explores key issues facing all of those concerned with the teaching of mathematics at both primary and secondary levels. The authors are writing in response to a variety of emerging educational challenges and constraints, including imposed national curricula and the changing political and technological arenas for education. The chapters are arranged in four sections. The first focuses on the practices of teachers and the experience of learners, the next offers new ways of thinking about the mathematics taught in schools. Then several writers examine the major constraints on what is taught from within the mathematics curriculum and in the final section there are six pieces which explore issues which are present behind any mathematics teacher's actions.