Lesson plan

Draw and identify angles by comparing them to known right angles

teaches Common Core State Standards CCSS.Math.Content.4.G.A.1 http://corestandards.org/Math/Content/4/G/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Idea(s): An angle is a figure made from two rays that have the same endpoint. Angles are given special names depending on their size. In this lesson, students build on 3.G.1 by discovering that when two rays share a common endpoint (or vertex) an angle is formed, which can be classified. Students will be introduced to benchmark angles; right, acute, obtuse, and straight as well as learn how to use the corner of a piece of paper to determine angle classification. This lesson will lay the foundation for future understandings of angle measurement using a protractor. Vocabulary: vertex, right angle, acute angle, obtuse angle, straight angle Special Materials: Pattern Blocks, grid paper optional