Students learn how to measure the perimeter of 2D shapes. by counting and laterÂ by creating and using a formula.

As learning progresses they area challenged to consider the perimeters of regular and composite shapes.

**Differentiated Learning Objectives**

- All students should be able to measure the perimeter of a shape by counting.
- Most students should be able to calculate the perimeter of a shape.
- Some students should be able to solve problems involving the perimeter of a shape.