Illustrating the Standards for Mathematical Practice
Properties of Quadrilaterals
Modeling and Using Tools, 9-12
Cathy Humphreys facilitates a geometric design task intended to deepen students' understanding of properties of quadrilaterals and scaffold their use of reasoning and proof. Students work in small groups discussing their strategies and reasoning while using a variety of tools that appear to support their engagement with and access to the mathematical ideas.
You may also download this video in a higher resolution format: properties of quadrilaterials.mov (493 Mb)
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