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Area of a Changing Triangle: Piecing It Together

Blake Peterson

Examining the covariation of triangle dimensions and area offers a geometric context that makes analyzing a piecewise function easier for students.

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GPS: How Does It Grow?

S. Asli Özgün-Koca, Kelly Hagan, Rebecca Robichaux-Davis, and Jennifer M. Bay-Williams

Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners’ growth as problem solvers across their years of school mathematics.

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Structuring Boardspace to Facilitate Repeated Reasoning

William DeLeeuw, Samuel Otten, and Ruveyda Karaman Dundar

The planful use of boardspace can help move the structure and regularity to the visual realm and make it more readily perceivable by students.