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Math Sponges: Enriching Ways to Soak Up Spare Moments
Math Sponges Enriching Ways to Soak Up Spare Moments Author:Leigh Childs, Nancy Adams Math Sponges contains 52 activities that require little or no preparation and take from three to ten minutes to complete. Organized alphabetically, with a subject index. Includes hints, variations, and extensions. Grades 3-6