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Odd Shape Out

big solutions to little problems

Jo Ann Cady and Pamela Wells

Solutions to a previous Solve It problem are discussed, and the procedures used with problem solving are explored.

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Matt B. Roscoe and Joe Zephyrs

Pull on the threads of congruence and similarity in a series of lessons that explores transformational geometry.

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Stephanie M. Butman

Research on students' learning has made it clear that learning happens through an interaction with others and through communication. In the classroom, the more students talk and discuss their ideas, the more they learn. However, within a one-hour period, it is hard to give everyone an equal opportunity to talk and share their ideas. Organizing students in groups distributes classroom talk more widely and equitably (Cohen and Lotan 1997).

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Joel Amidon and Matt Roscoe

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

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Joel Amidon and Matt Roscoe

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

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Kyle T. Schultz and Stephen F. Bismarck

A geometric approach using exact square manipulatives can promote an understanding of the algorithm to dismantle radical expressions.

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Carole E. Greenes, Mary C. Cavanagh, Jenny K. Tsankova, and Florence A. Glanfield

Students stroll through distance, rate, and time experiments on the road to strengthening their understanding of proportionality.

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Susan C. Gillmor and Samantha A. Rabinowicz

A service-learning activity that is tied to geometry concludes with a donation to a community food drive.

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Terri L. Kurz and Barbara Bartholomew

To support mathematical investigations, use this framework to guide students in constructing art-based and technology-based literature.

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Sarah B. Bush, Karen S. Karp, Victoria Miller Bennett, Liz Popelka, and Jennifer Nadler

An interdisciplinary activity connects mathematics and art from The Barnes Foundation museum in Philadelphia.