"The text effectively moves the reader toward a geometry and space curriculum that may open doors for many students....The ideas in this book are of high quality, well communicated and extensively referenced. Although the book is very dense with complex ideas, the vision of teaching and learning about geometry and space and the many useful frameworks, summaries of theory, and rich examples make the text a useful resource."—Horizon Research"...makes interesting reading for anyone nurturing an interest in the psychology of mathematics, especially for those involved in or contemplating research in the area....Hershkowitz's praise for ths work as pace-setter for change in mathematics education seems entirely justified....for a plethora of ideas about manipulation of visuospatial mathematical learning, look no further than the present volume."—American Journal of Psychology"Chazan and Lehrer have produced an important book at an opportune time. It will guide researchers and teachers in re-establishing geometry as a 'non-skippable' part of every child's mathematical education."—Canadian Journal of Science