Reflect on altering scale factors. The last lesson in the series of 22 has the class compare the two scale drawings they created. They realize that the scale drawing becomes a scale drawing of each other. Class members continue to work with other scale drawings as they create new ones with different scales.

Concepts

scale drawings, scale factors, scale, scale models, constant of proportionality, proportional reasoning, proportions

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Additional Tags

math

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Instructional Ideas

• Bring in model kits and compare the scale of the drawings in the instructions to the actual item
• Quickly review how to determine the scale from a drawing

Classroom Considerations

• The exploratory challenge uses the exercises from the previous two lessons

Pros

• The script for the discussion includes potential class responses
• Solutions for the in-class exercises show the computations students should use

Cons

• None

Common Core

7.G.A.1 MP1 MP2