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Harry Kretz

Harry Kretz taught high school math for many years at Hawthorn Valley Waldorf School in Upstate New York. Since retiring from full-time work, he has worked more than full time traveling and teaching courses in various Waldorf schools and teacher training centers.


Books by Harry Kretz :

Triangle, Circle and Soul

Paperback
$7.95

Trigonometry

A Practical Introduction
Spiral Bound
$12.95