In this section, students learn about scale drawings and use them to solve problems. They see that the principles and strategies that they used to reason about scaled copies of figures can be used with scale drawings.

At first, students work with scales that involve units (for example, “1 cm represents 10 km”). They interpret and draw maps and floor...

In this section, students study scaled copies of pictures and plane figures. Students begin by looking at copies of a picture, some of which are to scale and some of which are not. They use their own words to describe what differentiates scaled and non-scaled copies of a picture. As the section progresses, students learn that a scaled copy is...

In this final section, students have the opportunity to apply their thinking from throughout the unit. Since this is a short section followed by an End-of-Unit Assessment, there are no section goals or checkpoint questions. The lesson in this section is optional because it offers additional opportunities to practice standards that are not a focus of the grade.