Lesson Plan

Find The Perimeter: Real Life Objects

This lesson on perimeter will let your students walk around the class to see the border, use a measuring tape to measure the walls in their classroom, and enable them to understand how math is related to real life!
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Need extra help for EL students? Try the Real Life Perimeter pre-lesson.
View aligned standards
Need extra help for EL students? Try the Real Life Perimeter pre-lesson.

Learning Objectives

Students will be able to find the perimeter of various shapes.

The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.
EL adjustments


(5 minutes)
Geometry: PerimeterLet's Go AroundPresenting Perimeter
  • Ask your students if they know what the word perimeter means.
  • Remind them that perimeter is the length of the border of a shape.
  • Ask your students to make a line and walk around the classroom, touching the walls.
  • Explain to your students that the walls are the border of the classroom.
  • Tell them that if they wanted to find the perimeter of the classroom, they would measure the length of the walls and add them.

Beginning: Provide student-friendly definitions and images of the following words: perimeter, length, border.

Intermediate: Ask students to turn and talk to a partner to explain the process of finding perimeter in their own words. Encourage them to use words and pictures in their explanation.