**Circumferences, Diameters, and Radii**

Dwayne Belle Fuller School

4212 S. St. Lawrence

Chicago IL 60628

(312) 535-1688

**Objectives**:

Students will be able to measure circumferences in inches.

Students will be able to compute radii and diameters, given different

circumferences.

**Materials Needed**:

-blackboard

-notebook paper

-signs

-tape measures

-cans

**Strategy**:

The strategy will incorporate cooperative learning, and direct teaching

techniques. The direct teaching method explains the objectives and how to

measure the circumference in inches and compute the radii and diameters.

Cooperative learning encourages the students to interact to formulate the

correct answers.

Direct teaching techniques: A short lecture is given on how to measure the

circumference in inches and compute the radii and diameters.

Cooperative Learning: Students will form three groups. Each group will be given

a tape measure and cans. Each group will try and determine which can has the

largest circumference, radii and diameter. Students will compute and compare

their data. Next, students will be go to five workstations to measure the

circumference and compute the radius and diameter of a light pole and four

different size trees.

**Performance Assessment**:

Students will be given twenty objects to compute their circumferences after

measuring the diameters and radii.

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