Lesson plan

Measure angle openings precisely by using a protractor

teaches Common Core State Standards CCSS.Math.Content.4.MD.C.6 http://corestandards.org/Math/Content/4/MD/C/6
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Ideas: Angles are measured precisely by reading the markings between tens. This lesson continues to build on mathematical practice skills of attending to precision and using appropriate tools strategically by reading protractors to the precise degrees. As students gain knowledge and become familiar with protractors and degree measurement, they build the foundational skills for sketching angles of specific measurement. Vocabulary: protractor, arc, degree Special Materials: Protractor, straightedge optional