Sister Mary Motz, S.N.D de N. Using the Montessori mathematics materials, this book details presentations and variations for numeration one to ten, numbers beyond ten and addition, subtraction, multiplication and division operations. Many memorization games and exercises are included. 58 pp, soft cover, 2001 edition.
A box with 2 compartments and a sliding lid. The child places various objects in one or both compartments and slides the lid to cover or uncover them. (Objects not included).
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