This book, which was first published in 1990, is aimed at teachers,
mathematics educators and general readers who are interested in
mathematics education from a psychological point of view. The book
describes research findings that shed light on the learning of
mathematics from early arithmetic to high levels of algebra and
geometry. The book is the collaborative effort of a number of members of
the International Group for the Psychology of Mathematics Education and
primarily describes their work whilst at the same time covering many
issues that interest researchers in mathematics education.