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Recommended for: Grades 4-7

Resource: Scaling Up Photographs

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Media Type:
QuickTime Video

Length: 3m 26s
Size: 9.5 MB

In this video segment from Cyberchase, Bianca takes on a new job in a print shop. Her first assignment is to enlarge a photograph of the King of Sloovoonia. The enlargement is supposed to be a life-size image of the six-foot tall king. Working with percentages, Bianca makes a few failed attempts before she finally creates an enlargement that is the proper height and width.

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Teachers' Domain, Scaling Up Photographs, published October 8, 2008, retrieved on ,
http://www.teachersdomain.org/resource/vtl07.math.number.rat.scalephoto/

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 made a drawing you really liked and the drawing was on a 4 inch by 4 inch piece of paper. If you wanted to enlarge that drawing using a copy machine so it was three times larger, what are the dimensions of the enlargement? How would you describe the increase in size in terms of a percentage?

Focus: In this video segment, Bianca has to enlarge a photograph so it will be a life-size image. Notice what happens when she sets the enlargement for 100%. Does that complete her task? What does she finally set the enlargement size for to get the correct result? How did she figure that out?