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Standard 5: Use Appropriate Tools Strategically

Clip 12/13: Standard 5: Use Appropriate Tools Strategically Using Quadrilaterals Part 2E


Mathematically proficient students consider the available tools when solving a mathematical problem. These tools might include pencil and paper, concrete models, a ruler, [or] a protractor...

In this clip, groups are actively engaged in creating statements about the properties of their quadrilaterals that they can defend. The facilitator asks the resource manager to go get markers, paper, a ruler, and a compass for the group so that they can make their thinking visible. They continue to use the “kite sticks” from Tuesday’s lesson to experiment with different points of intersection. This clip is also indicative of standard 6 (attend to precision).

See this video in the context of an entire lesson.

Materials & Artifacts