1. Topic-
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2. Content-
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circumference, pi, radius, diameter & center
C= pi x d |
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3. Goals: Aims/Outcomes-
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Students will calculate the circumference of a circle by using the
measurement of its diameter or radius.
Students will work backwards to find pi by measuring the circumference
of a circle and dividing by its diameter. |
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4. Materials and Aids-
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Sir Cumference and the Dragon of Pi, A Math Adventure Written By:
Cindy Neushwander
Variety of Cans (cylinders) to measure, measuring tape, overhead projector,
worksheet 70 & 71 |
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5. Procedures/Methods-
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A. Introduction-
Read the book Sir Cumference and the Dragon of Pi aloud.
Review circle vocabulary throughout the story. |
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B. Development-
Introduce the formula for finding the circumference of a circle
(C=pi x d)
Discuss the History of pi.
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C. Practice-
Have students practice measuring the circumference and diameter
to the nearest millimeter of a variety of cylinders and use a calculator
to solve for pi.
Record data on the overhead to compare.
Then, practice finding the Circumference of circles when given the
diameter or radius of a circle. (Worksheet pg. 70)
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D. Independent Practice-
| Students complete homework page 71 on finding the circumference
of a circle when given the radius or diameter of a circle. |
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E. Accommodations (Differentiated Instruction)-
Students can practice measuring the circumference of a cylinder
in a small group during study hall with the teacher or Title I Tutor.
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F. Checking for understanding-
Teacher observations/participation:
Students can define circumference, radius, diameter, and center.
Students can state the formula for finding the circumference of a
circle.
Students can find the radius when given the diameter and vice versa. |
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G. Closure-
Review vocabulary terms and go over the homework assignment the
following day.
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6. Evaluation-
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Homework will be graded and checked for understanding.
Slate review on Friday |
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