Proportions Lesson 1 Episode 5 (Teachers)

Repeating Your Reasoning

Download Math TaskLink to Geogebra applet

The students figure out how to make the red car go faster than the blue car when the two cars both travel for 6 minutes.

Episode Supports

Focus Questions

For use in a classroom, pause the video and ask these questions:

1. [Pause video at 0:36] What does Kate and Christopher’s idea seem to be to make the red car go faster than the blue car?

2. [Pause video at 2:26] Can someone tell me in their own words what Kate is arguing?

Supporting Dialogue

Support students’ ability to use language precisely while talking about the quantities of distance and time by asking students to:

1. Restate their answers to Focus Question #2 to state precisely “the number of minutes” or “the number of miles.”

2. For example, if a student says 6, ask 6 what? If a student says 15, ask the student 15 what?