Exponentials Lesson 2 Episode 4 (Teachers)

Reflecting

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Josh and Arobindo compare the Marvel Cinematic Universe timeline to the timeline they have created to represent the growth of a magical beanstalk.

Episode Supports

Students’ Conceptual Challenges

If students are experiencing a challenge with simultaneously coordinating the quantities amount of timechange in height of beanstalk, and length of timeline segment, the task in this video can help. The Marvel Cinematic Universe timeline coordinates only the length of the segment of the timeline with some amount of time. By contrast, the exponential context requires coordinating those quantities with a third quantity, the change in height of a beanstalk, which Josh and Arobindo successfully point out [1:32].

Focus Questions

For use in a classroom, pause the video and ask this question:

[Pause the video at 0:53] Compare the two timelines—the Marvel Cinematic Universe timeline and the beanstalk timeline. What differences do you notice in the interpretation of 1-inch segments of each timeline?

Supporting Dialogue

After watching the video, encourage students to turn and talk with a partner. Ask them to tell their partner what they are understanding about the beanstalk timeline and what it represents. Then ask them to tell their partner what they are still figuring out or confused by. Have a discussion as a class about these insights and challenges.