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Mara G. Landers

A measurement-based activity can help students struggling to understand trigonometric functions.

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A set of problems of many types.

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David Rock and Joel Amidon

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

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Emily Sliman

Chalk Talk and Claim-Support-Question are two routines for developing students' ability to use multiple representations and encouraging classroom discussion.

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Melissa A. Stoner, Kristin T. Stuby, and Susan Szczepanski

By implementing high-impact activities, such as designing a school and a skate park, mathematical thinking can be linked to the engineering design process.

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Kasi C. Allen

A compelling contest motivates students and makes mathematics and STEM relevant.

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Steven Bannat

My favorite lesson is my lighthearted introduction to righttriangle trigonometry. I explain that we are starting a lesson that connects to the social studies curriculum—specifically, the Lewis and Clark expedition.

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A set of problems of many types.