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Maria E. Nielsen and Jonathan D. Bostic

Learn how to use and connect representations with lessons on linear functions.

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Eric L. McDowell

Enhance students' number sense and illustrate some surprising properties of this alternative operation.

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Clips about paper folding and lottery numbers inspire questions about exponential growth and probability.

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G. Patrick Vennebush, Thomas G. Edwards, and S. Asli Özgün-Koca

Students analyze items from the media to answer mathematical questions related to the article. This month's clips involve finding a mathematical error in an advertisement as well as working with ratios and proportions.

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Sheldon P. Gordon

We tell students that mathematical errors should be avoided, but understanding errors is an important tool in developing numerical methods.

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S. Asli Özgün-Koca

Student interviews inform us about their use of technology in multiple representations of linear functions.

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Jason Silverman, Gail L. Rosen, and Steve Essinger

Use digital signal processing to capitalize on an exciting intersection of mathematics and popular culture.

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Victor Mateas

Economics can be an avenue for teaching such algebra concepts as graphing curves, writing linear equations, solving systems of equations, and shifting graphs.

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Connie Colton and Wendy M. Smith

A multiphase lesson on selling T-shirts guides students from single-variable equations to linear relationships.

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Nicholas H. Wasserman

The practice of problem posing is as important to develop as problem solving. The resulting explorations can be mathematically rich.