Lesson Plan: Area of Squares and Rectangles Mathematics • 4th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use a formula to calculate the area of squares and rectangles.

Objectives

Students will be able to

  • state the formula for the area of a rectangle as length × width = area, or base × height = area,
  • state the formula for the area of a square as side length × side length = area, or base × height = area,
  • multiply to find the areas of squares and rectangles,
  • compare the areas of squares and rectangles,
  • find missing side lengths by finding missing factors,
  • investigate how many ways there are to make a rectangle with a given area.

Prerequisites

Students should already be familiar with

  • counting unit squares to find the area of rectilinear shapes,
  • finding the perimeter of squares and rectangles,
  • multiplying whole numbers up to 2 digits by 1-digit numbers,
  • multiplication tables up to 10×10.

Exclusions

Students will not cover

  • square numbers and exponents,
  • converting between units,
  • decimal values,
  • fractions.

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