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Jane-Jane Lo and Yi-Yin Ko

Develop mathematical knowledge by analyzing common student errors and discussing arithmetic, algebraic, and pictorial reasoning.

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Barbara Zorin, Patricia D. Hunsader, and Denisse R. Thompson

Learn how to modify classroom evaluation items to avoid potential difficulties that limit a teacher's insight into students' mathematical understanding.

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David Rock and Mary K. Porter

A monthly set of problems is aimed at a variety of ability levels.