How long until they collide?

Show the beginning of the video. Stop the video at about 39 seconds. Take guesses from students.

Have kids work individually on the problem for a few minutes or more, followed by partner work.  You might project the image below for students so they have a clean view of the problem.

Time rate distance problem image

After students have worked for a while and you have traveled around and selected some students and their work to share, show the rest of the video. This is also a great opportunity to talk about the dangers of distracted driving.

CCSS: 8.EE.7, HSA.REI.B.3HSA.CED.A.1

For members we have included a solution sheet and teaching suggestions.

CarA-crashing-into-carB-teacher.pdf

from Yummy Math http://www.yummymath.com/2016/how-long-until-they-collide/

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