Lesson Plan d.com
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|Lesson Title: Circles |Date: |
|Subject: Math |Grade Level(s): 6-7 |
|Teacher: |Time Frame: 60 minutes |
|Lesson Summary: |
|Students will be able to identify parts and characteristics of a circle, including calculating the circumference and the area. |
|Lesson Objectives |
| The students will know… |
|That every point on a circle is the same distance from its center. |
|How to identify a radius, chord, and diameter of a circle. |
|How to calculate the circumference and the area of a circle. |
| |
|The students will be able to… |
|Identify parts and characteristics of a circle, including calculating the circumference and the area. |
|Lesson Plan |
|Time: |Procedure: |Materials Needed: |
|5 minutes |Warm-up Exercise: |Ruler; circles cut from tag board (one per student) |
| |As the students come into class, make sure that each student gets a| |
| |circle whose radius is a whole number of inches and whose center is| |
| |labeled and a ruler. Ask each student to draw three different line | |
| |segments on their circle that have their endpoints on the circle | |
| |and pass through the center point. Ask students to measure each of | |
| |those line segments. Ask students to measure from the center to one| |
| |end of each line segment. Ask students to label these lengths on | |
| |their circle. | |
|5 minutes |Motivation (Real-world Applications): |Pencil; circles from the Warm-up Exercise |
| |Ask students to look at their circles from the Warm-up Exercise. | |
| |Ask students to trace their pencil around the edge of their paper | |
| |circle. | |
| | | |
| |Explain to the students that each of the points on the edge of | |
| |their circle is the same distance from the center point. | |
| | | |
| |Encourage students to think of where they would see circles in the | |
| |real world. | |
|20 minutes |Presentation of New Material: |Computer; projector; PowerPoint Presentation, slides 2–7 |
| |Explain that all circles have the same parts and the same | |
| |characteristics. As you work through the PowerPoint presentation | |
| |for this lesson, demonstrate examples on a circle drawn on your | |
| |chalkboard. For slides 6 and 7, remind students that 3.14 is used | |
| |as an approximation of pi. | |
|15 minutes |Guided Practice: |Paper and pencil; circles from the Warm-up Exercise; ruler; string |
| |Have pairs of students work together to use a piece of string and a| |
| |ruler to measure the circumference of their circle. Then have the | |
| |students use the radius and diameter measurements of their circle | |
| |to calculate the circumference using the two formulas. Ask students| |
| |to compare their string measurement with the formula calculations. | |
| |Then have students calculate the area of their circle using the | |
| |formula, making sure they understand that the area is measured in | |
| |square units. | |
|10 minutes |Independent Practice: |Copies of the Study Island Worksheet on Circles |
| |Have students work on the Study Island Worksheet on Circles. | |
|5 minutes |Closing Activities: | |
| |Walk around the room to get examples of circles with their parts | |
| |labeled to display in the classroom. | |
|Homework: Students should work to complete the Study Island Worksheet on Circles. |
|Differentiation: Have students needing extra support create and use flash cards for the following parts and characteristics of a circle: center, radius, diameter, |
|chord, circumference, and area. For students needing an additional challenge, assign each student a radius expressed as a fraction or a decimal. Have students draw|
|the circle on a coordinate grid and calculate the diameter, circumference, and area. |
|Teacher Reflection: |
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