# Lesson Plan: Area: Nonstandard Units Mathematics • 3rd Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to define the area of a shape and calculate the area of a rectilinear shape by counting unit squares.

#### Objectives

Students will be able to

• define area as the amount of space taken up by a two-dimensional shape or surface,
• count unit squares to find the area of a rectilinear shape in square units,
• identify rows and columns to assist in counting unit squares to determine the area,
• compare and order the areas of rectilinear shapes calculated in square units.

#### Prerequisites

Students should already be familiar with

• recognizing and defining rectangles and squares,
• the language of comparing and ordering (greater than, less than, equal to, greatest, least),
• skip counting by twos, threes, fours, and fives,
• comparing and ordering whole numbers.

#### Exclusions

Students will not cover

• standard units of area,
• areas of shapes other than rectangles,
• nonstandard units of area other than unit squares (e.g., triangles, rectangles).