Lesson

# Clip 9/13: Standard 2: Reason Abstractly & Quantitatively Using Rates Part 1L

## Overview

Mathematically proficient students make sense of quantities and their relationships in problem situations... Quantitative reasoning entails habits of creating a coherent representation of the problem at hand; considering the units involved; attending to the meaning of quantities, not just how to compute them; and knowing and flexibly using different properties of operations and objects.

Joe Condon works with his 6th grade students to identify strategies for comparing unit rates. In these clips, he begins with a definition of rate developed and expanded by the class over the two-week period. His students are asked to name familiar rates. He then presents them with interactive and real-life scenarios and asks them to calculate the fastest unit rates and justify their answers. Condon refers his students to strategies for comparing rates, asking the students to use these strategies with new data. The students then discuss their responses with the whole group, and conclude that the best rates depend on the goal of the calculation.