Solid Geometry, by Harry Kretz
$ 15.00

"This little volume presents a rich and ready compendium for grade eight on Platonic solids, together with a practical and lively teaching approach, which will be welcomed by novice and old hand alike. And the teacher will find that the development set forth in this manual will enable him or her to effect the task at hand in a manner which is pedagogically effective and mathematically meaty, lucid, and meaningful."

- Amos Franciscelli, from the Foreword

The first part of this manual is a collection of plates as they might appear in a student's notebook. The second part is a teacher's guide describing some of the class activities that lead to the notebook.

Harry Kretz taught high school math for many years at Hawthorn Valley Waldorf School in Ghent, New York. Since retiring from full-time work, he has worked more than full-time travelling to teach courses for a few weeks at a time in various Waldorf schools and teacher training centers.