Here are some books and documents in English
I Form Drawing Grades 1–4 by Laura Embrey-Stine & Ernst ·Schuberth, Rudolf Steiner College Press. See http://steinercollege.edu/rscpress/form-drawing-grades1-4
II Geometry Lessons in the Waldorf School Volume 2: Freehand Form Drawing and Basic Geometric Construction in Grade 5 by Ernst Schuberth ©AWSNA Publications, 2004, Companion CD Rom, Author: Ernst Schuberth Editor: David Mitchell, Proofreader: Ann Erwin
III First Steps in Proven Geometry for the Upper elementary Grades. Geometry Lessons in the Waldorf School. Volume III. Translator Nina Kuettel. Association of Waldorf Schools of North America (AWSNA) 1999
IV Teaching Mathematics for First and Second Grades in Waldorf Schools Math curriculum, basic concepts, and their developmental foundation, Rudolf Steiner College Press, Fair Oaks, California 1999
V Social Education through Mathematics Lessons in: Waldorf Science Newsletter Vol. 8. No. 13 Automn 2000, Editors: David Mitchell &John Petering, 1158 Quince Ave., Boulder, CO 80304, Fax 303-541-9244, page 17 ff
VI Math Difficulties – Diagnosis, Symptoms and Therapy Developmental Insights – discussions between doctors and teachers, Editor David S. Mitchell, published by: The Association of Waldorf Schools of North America, 3911Bannister Road, Fair Oaks, CA 95628, 2002
VII Mathematics Lessons for the Sixth Grade The Association of Waldorf Schools of North America, 3911 Bannister Road, Fair Oaks, CA 95628, 2002
For more information contact the author