In the second book of this series, Gattegno concentrates in Part 3 on Psychological discussions, and in Part 4 on Films. Gattegno states in the preface of this book that:

The notions introduced in two or three of the articles following the first in this volume I  believe to be powerful tools whose affect may be, if they are properly used, a dramatic increase in our knowledge of the psychology of mathematics, and not merely an a priori description of what one wishes to see or find.

Dr Caleb Gattegno

First published 1963

Educational Explorers Ltd

isbn 0 85225 612 4

Paperback 124 pages