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A Lesson Plans Page Math Lesson Plan, Thematic Unit, Activity, Worksheet, or Teaching Idea in Mathematics, Maths
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Printable Version for your convenience!

Summer Jett

Topic: Measurement (area and perimeter)

Grade level: Second or Third

Objective: Students will be able to demonstrate that objects with the same perimeter do not necessarily have the same area.

Materials: centimeter squared paper, string

Procedure:

Begin by having students trace their feet on the centimeter squared paper. Then have them find the area of their feet in square centimeters and record their measurements. Now, use string to put around the traced feet and cut it to represent the perimeter of their feet. Now look for other students that have the same or similar perimeters and see if the area is the same also. Most likely, there will be some students whose foot perimeter is the same, but their foot areas are different. Use these examples to show students that objects that have the same perimeters do not necessarily have the same area. To extend this to another situation, have students use the string that they cut to fit the perimeter of their feet, to make squares on the grid paper. Now measure the area of the square and compare it to the area of their feet. Also, ask students to try to make a shape using their string that does have the same area as their foot. Finally, have students make different shapes with the string that all have different areas.

Source:

Burns, M. (1992). About teaching mathematics: a K - 8 resource. New York: Math Solutions Publications.

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