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William C. Zahner

Principles for using groups in linguistically diverse classrooms are illustrated with a task about measurement and proportionality.

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Keith M. Dreiling

This article compares constructions in Euclidean geometry to equivalent results in Taxicab geometry.

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Sally Moomaw, Victoria Carr, Mary Boat, and David Barnett

Consider using a game-based assessment of number sense in young children, including those at risk because of socioeconomic level, disability, or the necessity of learning a second language.