In this unit, students learn to understand and use the terms “scaled copy,” “to scale,” “scale factor,” “scale drawing,” and “scale,” and recognize when two pictures or plane figures are or are not scaled copies of each other. They use tables to reason about measurements in scaled copies, and recognize that angle measures are preserved in scaled copies, but lengths are scaled by a scale factor and areas by the square of the scale factor. They make, interpret, and reason about scale drawings. These include maps and floor plans that have scales with and without units.
Unit at-a-glance
Pre-Unit Diagnostic |
Section 1:
Scaled Copies |
Section 2:
Scale Drawings |
Section 3:
Let’s Put It to Work |
End-of-Unit assessment |
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Suggested pacing | Day 1 |
Days 2-7 Lessons 1-6 |
Days 8-13 Lessons 7-12 |
Day 14 Lesson 13 |
Day 15 |
The pacing guidance is a suggestion only and based on a 45-60 minute daily math block. Those with more or less time should adjust accordingly. Depending on the particular lesson and your students’ needs, you may need to extend or condense lessons.
Resources for this unit
Lessons & assessments
Lessons 1-6: Scaled Copies
Lessons 7-12: Scale Drawings
Lesson 13: Let’s Put It to Work
Adapted from Open Up Resources under CC BY license. All adaptations copyright LearnZillion.