1. Topic

Relating Circumference and Diameter 


2. Content

Introduction of Pi
Key Vocabulary: Circumference, Diameter, Pi. 


3. Goals: Aims/Outcomes

Students will be able to:
1. Describe the relationship between circumference, diameter, and
Pi
2. Solve problems that apply knowledge of circumference, diameter,
and Pi. 


4. Objectives

Students will be able to:
1. Measure diameter and circumference.
2. Analyze diameter and circumference data.
3. Solve problems that apply knowledge of circumference, diameter,
and Pi.



5. Materials and Aids

Measuring tapes, various circular objects (lids, cans, plates, etc.),
calculators, rulers. 


6. Procedures/Methods

A. Introduction
1.Question of the day  Students write down as many things they
know about circles
2. Review lesson goals/objectives. 


B. Development
1. Students share what they know about circles.
2. Define Circumference and Diameter.
3. Assign data collection task (handout).
4. Model what the data collection should look like. 


C. Practice
1. Students collect data of various circular items.
2. Students estimate relationship between diameter and circumference.
(C = D x a little more than 3)
3. Students calculate (with calculator) actual circumference divided
by diameter.
4. Discussion of origin of Pi.
5. Discussion of "The Big Wheel" and the "Bighorn Medicine Wheel" 


D. Independent Practice
1. Using ruler, calculator, and cup, calculate the circumference
of the top rim of a cup in centimeters (cm).
2. Explain the steps taken to get their answer.
(Handout #2) 


E. Accommodations (Differentiated Instruction)
1. Depending on ability and familiarity of topic  use Millimeters,
rather than Centimeters to generate a more accurate result.
2. Data collection can be done as demonstration with students.
3. 1:1 direct instruction as needed during final assessment. 


F. Checking for understanding
1. Monitoring
2. Direct Feedback
3. Handout #2 


G. Closure
1. Review of lesson goals and objectives.
2. What did we learn today?
3. Why did we learn it? 

