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Lesson Plan

Add quantities by using a number line as a math tool

teaches Common Core State Standards CCSS.Math.Content.2.MD.B.5 http://corestandards.org/Math/Content/2/MD/B/5
teaches Common Core State Standards CCSS.Math.Content.2.MD.B.6 http://corestandards.org/Math/Content/2/MD/B/6
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Big Ideas: Numbers can be added in any order and we will still get the same total. This lesson builds on students' work with adding fives and tens on a number line. The task presents three paths for students to choose from to beat the high score. They must collect points, write an equation to show the amounts and record their work on a number line. Students must decide if their score beats the high score and if so, by how much. As students consider how to find the total, they think about ways to efficiently add the numbers and grapple with the idea that numbers when added can be rearranged and we will still get the same total. Students continue to work on efficiently recording their thinking on the number line. Vocabulary: addition, total, sum, number line, compare Special Materials: Classroom number line 0-100 (optional) individual number lines 0-100 incremented in 5s and 10s
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