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Recommended for: Grades 3-6

Resource: Several Short Rails Make More Than A Whole

Several Short Rails Can Make More Than One Whole Unit

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Media Type:
QuickTime Video

Length: 2m 47s
Size: 7.8 MB

In this video segment from Cyberchase the CyberSquad is trying to get to the Mother’s Day Harvest on the Madre Bonita Express train. Hacker has ripped out a piece of the train track, however, and Digit must use decimal addition to find a way to repair the track using only the pieces available.

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Transcript (Rich Text Format Document)

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Teachers' Domain, Several Short Rails Make More Than A Whole, published August 25, 2008, retrieved on ,
http://www.teachersdomain.org/resource/vtl07.math.number.dec.shortrailu/

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 you had two oranges and cut them both in half. If you took three of those pieces and put them together, how much orange would you have? How would you write that number using whole numbers and fractions? How would you write it using decimals?

Focus: In this segment, Digit is trying to find a piece of track that is the same size as the section of track that Hacker ripped out. Unfortunately there are no pieces of track left that are that exact size. Write down the size of the three pieces Digit uses, and then see if you can add them up to find the total amount of track needed.