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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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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.

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Become an Escher Sleuth

classroom-ready activities

Linda L. Cooper, Sandy M. Spitzer, and Ming C. Tomayko

Students discover why certain regular polygons tessellate and how M. C. Escher translated and rotated modifications of polygons to create tessellations.

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Dana C. Cox and Michael Todd Edwards

How do middle school students interpret the phrase “two sizes too small”? Examining students' responses will re-form your thinking about teaching similarity and using nonstandard shapes.