Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

3. Measure area by counting square units (FP)

teaches Common Core State Standards CCSS.Math.Content.3.MD.C.5a
teaches Common Core State Standards CCSS.Math.Content.3.MD.C.5b
teaches Common Core State Standards CCSS.Math.Content.3.MD.C.6
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP6
Quick assign

You have saved this lesson!

Here's where you can access your saved items.

Content placeholder

Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Measure the area of plane figures by counting square units.

This lesson helps to build procedural skill with finding the area of plane figures. Square tiles and graph paper are used here because they support students' understanding that we count square units covering a figure to measure area. This work develops students' understanding that square units or unit squares (that cover a figure without gaps) can be used to measure the area of a figure, which is said to be n sqaure units.

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they count unit squares to determine the area of plane figures. They use square tiles and squares on graph paper to count the number of square units that cover a plane figure. They begin to understand that different shaped figures can have the same area.

Key vocabulary:

  • area
  • plane figure
  • square unit
  • tile
  • unit square

Special materials needed:

  • square inch tiles (if none are available, there is a printable set of square inch tiles under the Additional Materials tab)
Related content

Appears in

Developing conceptual understanding of area

Provide feedback