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  • Author or Editor: Erin E. Baldinger x
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Kathy L. Sun, Erin E. Baldinger and Cathy Humphreys

Support your high school students in the challenging transition from memorization to understanding.

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Erin E. Baldinger, Matthew P. Campbell and Foster Graif

Students need opportunities to construct definitions in mathematics. We describe a sorting activity that can help students construct and refine definitions through discussion and argumentation. We include examples from our own work of planning and implementing this sorting activity to support constructing a definition of linear function.

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Erin E. Baldinger, Sarah Kate Selling and Rajeev Virmani

Leading a whole-class mathematics discussion is complex work. The teacher must attend to and respond to student thinking while continually keeping the mathematical goals of the discussion in mind. This work is especially challenging for novice teachers who are just learning to facilitate classroom talk. We present a new sortingtask instructional activity designed to support novice secondary teachers in steering a discussion toward a mathematical point while eliciting and making use of student thinking. We describe our efforts to support novice teachers through learning about, rehearsing, enacting, and reflecting on this sorting task. We document the impact of these supports for the novice teachers, and share ways that other teacher educators can take up this structure.