Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

12. Find the perimeter of polygons marked with unit length markers (FP)

teaches Common Core State Standards CCSS.Math.Content.3.MD.D.8 http://corestandards.org/Math/Content/3/MD/D/8
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
Quick Assign

You have saved this lesson!

Here's where you can access your saved items.

Dismiss

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Find the perimeter of a polygon marked with unit length markers, but without numbers.

This lesson helps to build procedural skill with determining perimeter. Polygon models are used here because they provide a visual that supports the skill of finding perimeter. This work develops students' understanding that perimeter is the sum of the length of the sides of a polygon.

Students engage in Mathematical Practice 5 (Use appropropriate tools strategically) as they use unit length markers to determine perimeter in the same way they would use a ruler. They can also use other length measuring tools but without numbers marking the units.

Key vocabulary:

  • perimeter
  • polygon
  • sides
  • unit

 

Related content

Appears in

Developing strategies for addition and subtraction

Provide feedback