Unit 2

Area and Multiplication

Unit Goals

Unit Narrative

In this unit, students encounter the concept of area, relate the area of a rectangle to multiplication, and solve problems involving area.

In grade 2, students explored attributes of shapes, such as number of sides, number of vertices, and lengths of sides. They measured and compared lengths (including side lengths of shapes).

In this unit, students make sense of another attribute of shapes: a measure of how much space a shape covers. They begin informally, by comparing two shapes and deciding which one covers more space. Later, they compare more...

Section A

Section Goals

Section Narrative

In this section, students reason about area as an attribute of two-dimensional shapes and develop a sense of area as the amount of space covered by a shape.

They begin by considering how to show or explain a shape as being larger than or smaller than another. Next, they see that they can quantify the size of shapes more precisely...

Let’s compare the sizes of shapes.

Let’s use square tiles to measure area.

Let’s count square tiles.

Let’s find the areas of more rectangles.

Section A Practice Problems

to access Section Checkpoints.

Section A

Let’s compare the sizes of shapes.

Let’s use square tiles to measure area.

Let’s count square tiles.

Let’s find the areas of more rectangles.

Section B

Section Goals

Section Narrative

In this section, students relate the areas of rectangles to multiplication expressions.

Students see equal-size groups in rectangles that are tiled with squares. They learn to express the area of a rectangle as a product of two measurements that describe the number of equal groups. For example, in a rectangle that is 8 units by 4 units, students see 8...

Let’s connect multiplication expressions to areas.

Let’s learn about different units we can use to measure area.

Let’s learn about larger square units.

Let’s solve area problems, without a grid.

Let’s measure the sides of rectangles and find the areas.

Let’s solve area problems.

Let’s explore area and the multiplication table.

Section B Practice Problems

to access Section Checkpoints.

Section B

Let’s connect multiplication expressions to areas.

Let’s learn about different units we can use to measure area.

Let’s learn about larger square units.

Let’s solve area problems, without a grid.

Let’s measure the sides of rectangles and find the areas.

Let’s solve area problems.

Let’s explore area and the multiplication table.

Section C

Section Goals

Section Narrative

In this section, students encounter figures composed of non-overlapping rectangles and find their area.

As with the rectangles in earlier lessons, students see increasingly abstract diagrams, starting with figures that are fully gridded, moving to those with a partial grid, and ending with figures showing only side lengths and no grid. The progression encourages students to decompose the figures and...

Let’s find the area of a figure made up of rectangles.

Let’s find the area of a figure.

Let’s find the area of a figure with unknown side lengths.

Let’s fit furniture into a room.

Section C Practice Problems

to access Section Checkpoints.

Section C

Let’s find the area of a figure made up of rectangles.

Let’s find the area of a figure.

Let’s find the area of a figure with unknown side lengths.

Let’s fit furniture into a room.

to access End-of-Unit Assessments.

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Area and Multiplication

Unit Goals

Unit Narrative

Section Goals

Section Narrative

Section A Practice Problems

Section Goals

Section Narrative

Section B Practice Problems

Section Goals

Section Narrative

Section C Practice Problems

Unit 2 Resources

About Unit 2

Other Resources

Section Goals

Section Narrative

Section B Practice Problems

Section Goals

Section Narrative

Section C Practice Problems

Section Goals

Section Narrative

Section A Practice Problems