Students will explore the concept of area. Students will:

- choose the appropriate units of measure for area for a given shape or region.
- understand the difference between estimated and actual area.
- develop different strategies to find the area of irregular shapes.
- apply multiplication to the area of rectangles and squares.

How precise do measurements and calculations need to be?

In what ways are the mathematical attributes of objects or processes measured, calculated and/or interpreted?

What does it mean to estimate or analyze numerical quantities?

What makes a tool and/or strategy appropriate for a given task?

When is it is appropriate to estimate versus calculate?

Why does “what” we measure influence “how” we measure?

- What does it mean to estimate or analyze numerical quantities?
- When is it appropriate to estimate versus calculate?
- What makes a tool and/or strategy appropriate for a given task?
- Why does “what” we measure influence “how” we measure?
- In what ways are the mathematical attributes of objects or processes measured, calculated, and/or interpreted?
- How precise do measurements and calculations need to be?

**Area:**The number of square units needed to cover a flat surface.**Estimate:**A rough judgment or calculation.**Square Unit:**A unit used to measure area.

90–120 minutes

Prerequisite Skills haven't been entered into the lesson plan.

- standard measuring tools (ruler, yardstick, meter stick)
- grid paper (M-4-1-2_Square Centimeter Grid Paper.doc and M-4-1-2_Square Inch Grid Paper.doc)
- large sheets of grid paper (optional)
- Shape 1 (M-4-1-2_Shape 1.doc)
- Shape 1 with Unmarked Square Inches (M-4-1-2_Shape 1 with Unmarked Square Inches.doc)
- Shape 1 with Square Inches (M-4-1-2_Shape 1 with Square Inches.doc)
- Shape 1 with Square Centimeters handout (M-4-1-2_Shape 1 with Square Centimeters.doc)
- construct drawings of a square foot, a square yard, and a square meter on chart paper for students to see their relative sizes
- chart paper
- construction paper
- 3 x 5 inch index cards (optional)
- Pattern-block pieces (optional)
- rulers with inches and/or centimeters
- various rectangles cut out with similar or equal areas
- Area Four Square activity (M-4-1-2_Area Four Square and KEY.doc)
- Area Chart (M-4-1-2_Small Group Area Chart.doc)

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.

- standard measuring tools (ruler, yardstick, meter stick)
- grid paper (M-4-1-2_Square Centimeter Grid Paper.doc and M-4-1-2_Square Inch Grid Paper.doc)
- large sheets of grid paper (optional)
- Shape 1 (M-4-1-2_Shape 1.doc)
- Shape 1 with Unmarked Square Inches (M-4-1-2_Shape 1 with Unmarked Square Inches.doc)
- Shape 1 with Square Inches (M-4-1-2_Shape 1 with Square Inches.doc)
- Shape 1 with Square Centimeters handout (M-4-1-2_Shape 1 with Square Centimeters.doc)
- construct drawings of a square foot, a square yard, and a square meter on chart paper for students to see their relative sizes
- chart paper
- construction paper
- 3 x 5 inch index cards (optional)
- Pattern-block pieces (optional)
- rulers with inches and/or centimeters
- various rectangles cut out with similar or equal areas
- Area Four Square activity (M-4-1-2_Area Four Square and KEY.doc)
- Area Chart (M-4-1-2_Small Group Area Chart.doc)

Instructional videos haven't been assigned to the lesson plan.

Final 05/10/2013

Please wait...