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Recommended for: Grades 3-6

Resource: Keeping Track of the New York City Marathoners

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Media Type:
QuickTime Video

Length: 3m 22s
Size: 9.2 MB

In this video segment from Cyberchase, Bianca has volunteered to help count the number of runners participating in the New York City Marathon. She must keep track of the runners as they pass a certain checkpoint on the course. There are at least 30,000 runners, so she has to develop a good strategy for counting such a large number of people. She tests out a few options, but finds that an abacus may be her best tool.

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Transcript (Rich Text Format Document)

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Teachers' Domain, Keeping Track of the New York City Marathoners, published October 8, 2008, retrieved on ,
http://www.teachersdomain.org/resource/vtl07.math.number.nums.nycmaratho/

Frame and Focus
Follow Up
Connections
Standards

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Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Frame: Let’s say your friend owns a very busy store. She wants to keep track of how many customers come into the store between 9:00 a.m. and noon. How would you keep track of something like that? Is there more than one way that you could do it?

Focus: As you watch this video segment, you’ll see how Bianca tries to figure out the best way to keep track of all the runners. She considers a few methods, but rejects them for various reasons. What method does she finally decide to use?