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This lesson is designed to teach students to measure angles with a protractor. The student will be taught how to read the protractor correctly by using either the top or bottom set of numbers. The lesson will reinforce classifying angles as acute, right, and obtuse. The student will sketch angles given a specified measure.
This lesson results from the ALEX Resource Gap Project.
Primary Learning Objective(s):
The student will be able to measure angles to the nearest whole number degree using a protractor.
The student will be able to sketch an angle from a specified measure.
Additional Learning Objective(s):
The student will be able to classify angles by its measure.
61 to 90 Minutes
Materials and Resources:
Class set of protractors
Worksheet from the website https://www.mathworksheets4kids.com/angles/measuring/standard-type1-easy1.pdf (copy for all students)
Measuring Angles worksheet in the attachment section
Worksheet for Accelerated Students: Make copies as needed
Computer, laptop, or iPad (use with intervention website)
Intervention Website: (click on the step by step button)
Technology Resources Needed:
Desktop computer with access to interactive whiteboard
The teacher needs to have taught the students how to recognize the different types of angles using pattern blocks. The teacher needs to have enough protractors for all the students. The teacher will need to practice using the protractor tool on the interactive whiteboard. This is an introductory lesson for measuring angles.
The student should know the parts of an angle. The student needs to know the following terms: vertex, rays, acute, obtuse, right, and straight.
The teacher will monitor the students as they measure angles in the group activity, making sure that all students are measuring the angles accurately with the protractors.
The teacher will use the worksheet called Measuring Angles in the attachment section to make sure all students have mastered measuring angles with a protractor.
The accelerated students will be assigned the worksheet, https://www.mathworksheets4kids.com/angles/measuring/multiple-rays1.pdf.
Struggling students may need one-on-one instruction in a small group and use the following website: (click on the step by step button) http://studyjams.scholastic.com/studyjams/jams/math/geometry/measure-angles.htm.