Our Circles Lesson Plan equips students to define and identify the area, diameter, radius, and circumference of a circle. This lesson includes instruction for the formula to find the area of a circle, as well as a circles of circles activity that leverages peer learning in a fun, meaningful way. Anchor understanding and application of the concept and formulas with the homework assignment to locate and measure real-world circle objects. Develop student confidence as they orally communicate the procedure and formula to find the area and circumference of their favorite thing that involves, or includes a circle.
Sample Classroom Procedure / Teacher Instruction
- Display the circular objects or images and ask students: What do all of these have in common?
- Allow for responses and discussion. Introduce the area of a circle, and the terms related such as circumference, radius, and diameter. Explain to students that finding the area of a circle is different than finding the area of rectangles.
- Ask the students if they know what pi means?
- Allow for responses and discussion. Review pi if necessary.
- Distribute Circles content pages. Read and review the information with the students. Save the final question for lesson closing. (Remind students that many circular items are actually 3-dimensional, and they will be measuring the tops of items during the lesson.) Use the additional resources to enhance understanding.
- Distribute the Activity pages. Read and review the instructions. Distribute the supplies. Once completed, review the students’ answers. They should be the same for each circle.
- Assign groups of students to join and create their circles of circles. Display the circles in the classroom or other area of the school.
- Distribute the Practice page. Check and review the students’ responses.
- Distribute the Homework page. The next day allow students to share some of the at-home items and the measurements of the circle. (Responses will vary.)
- Ask the students the following question: What is your favorite thing in life that involves, or includes a circle? Why?
- Allow for responses and discussion. Ask the students how they can find the area of that circle and its circumference.
- Allow the students to orally explain the procedure and formula.
Common Core State Standards: None Listed for Grade Levels
Class Sessions (45 minutes): 1 – 2 class sessions
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