Clip 2/7: Standard 4: Model with Mathematics Using Proportions & Ratios Part 3A
Overview
Mathematically proficient students can apply the mathematics they know to solve problems arising in everyday life, society, and the workplace. In early grades, this might be as simple as writing an addition equation to describe a situation... They routinely interpret their mathematical results in the context of the situation and reflect on whether the results make sense...
Hillary Lewis-Wolfsen invites students to examine a problem about proportions and ratios with a strategy used by a student to organize the information in the problem. In this clip, she gives students “private think time” to work the problem again, refreshing their memories about the problem, asks them to use their “think sheets” to record their ideas, then has them turn to a partner and share and defend their thinking. In the discussion, the pairs share where they think the example student’s strategy reflected misunderstandings of the quantities.