Instructor: _______________
Time Frame: 80 minutes
Subject: Math Grade 6 Date: _______________
Circles
Essential Question: If pi is a constant (though irrational) number, why did our "discoveries" vary? (Explain
and give examples)
Objective (s) Numbers:
2.02; 3.02
Outcomes:
The student will be able to solve problems involving perimeter/circumference and area of
plane figures, identify the radius, diameter, chord, center, and circumference of a circle and
determine the relationships among them.
Materials:
Textbook pages 514-520; compasses, rulers, protractors, string, various circular objects,
Discovering Pi Practice 10.5 (from Math6.org)
Anticipatory Set: Today we will learn to identify the parts of a circle and find the circumference and
area of a circle.
During the Lesson
Presentation of Information:
Integration of Other Subjects:
Writing (narrative)
Reading (vocabulary, problem solving, analyzing expectation)
Integration of Reading:
Reading for information and interpretation.
Integration of Technology:
Computer, Projector, PowerPoint, Internet
Modeling: The students will use the compasses to draw circles and model each of the
vocabulary terms; center, radius, diameter, chord, circumference, pi
Differentiation:
504 modifications ET and RA.
dditional student and teacher modeling will help to
guide all students to reach expected outcomes.
Guided Practice: Students will use string to measure the circumference of various circles, then use
calculators to find the relationship between the circumference and the diameter.
Students will complete the worksheet - Discovering Pi Practice 10.5. Students will be
shown memorization techniques to memorize circle formulas: D=2R, C=πD; A=πRR
After the Lesson
Independent Practice Text page 518-519 {1–3, 6–9, 13–15, 17, 23–30}
AIG: {1–3, 6–9, 16–17, 19–20, 23–30}
Assign workbook page 10.5
Closure / Assessment: Write a narrative story (3 paragraphs) to tell a fifth grade student about today's
discovering pi activity. Open with expectations and a hook. Discuss the activity and
close your narrative by telling them what you discovered and/or why they should try it
out for themselves.
Reflection:
Integration with School-wide Focus: Improve mathematics computation and problem solving.