Unit 7, Lesson 9
Use a Protractor to Measure Angles
Grade 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to understand
Lesson Narrative
Before this lesson, students have compared and measured angles, using informal tools (analog clocks) and reference angles, all of which were multiples of
Students then make sense of one-degree angles in terms of a fraction of a
Students will continue to add new vocabulary to their personal word walls. In the next lesson, students further develop their ability to use a protractor by measuring a variety of angles, with less support.
- Describe (orally and in writing) that 1 degree is a
turn through a full circle.
Required Materials
Activity 1
Required Preparation
None
Teacher Reflection Questions
The first two activities offered opportunities for students to take multiple solution paths. Were all unique perspectives or strategies heard? Which students were able to share their ideas? Which didn’t get a chance? How can their voices be added into the conversation tomorrow?
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