These are all supplemental materials. I find Math the most difficult subject to teach, No, it's not difficult for my children to learn, but I find it hard to get excited about teaching it. Just look at all the math resources I already own, and yet I find myself scratching my head and not sure what to do each day.
25 Plays Inspired By Waldorf Teachersedited by David Mitchell has a science/mathematics play for Grade 7 called "The Order of the Heavens."
Of course, I also have Eric Fairman's Path of Discovery volume 8: grade 8, as well as his A Steiner-Waldorf Mathematic Resource for grades 1-8, Dorothy Harrer's Math Lessons for the Elementary Grades (1-6), Roy Wilkinson's book on Teaching Mathematics and a lot of books for the earlier years, such as Henning Andersen's Active Arithmetic.
Hopefully once we get into the school year I will find my enthusiasm for this very important subject!!!!