## Lesson: Finding Perimeter and Area

Developing the Concept

In the previous lesson, students explored perimeter by counting the number of units around a figure. In this lesson, students will progress to finding perimeter by using addition. Students will also broaden their understanding of area by counting whole square units and half square units.

**Materials:** one piece of square grid paper for each student

**Preparation:** Draw a 2-by-2 square grid on the chalkboard.

**Prerequisite Skills and Background:** Students should understand the concepts of perimeter and area and know how to find perimeter and area by counting units and square units.

**Wrap-Up and Assessment Hints**

These hands-on activities will help your students differentiate between perimeter and area. You can assess their understanding by having them draw different polygons on square grid paper and find the perimeter and area of the polygons. They should be able to explain to you the process they are following to find each measure.