Relating Scale Drawings to Ratios and Rates

Enlargements and reductions are all about scale. The lesson introduces scale drawing to the class. Pupils determine whether the drawing is a reduction or an enlargement and the constant of proportionality between the original and the drawing. The lesson is the 16th part of a 22-part series.

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CCSS: Designed
Instructional Ideas

  • Have the class look through popular magazines and find scale drawings and determine whether they are enlargements or reductions
Classroom Considerations

  • The class should be familiar with finding ratios
  • Consider using a different map that may be more familiar to the class than a subway map
Pros

  • Includes images to project to demonstrate scaling
  • The handout includes the lesson summary
Cons

  • None
Common Core