Lesson plan

Add within 100 by making equivalent equations

teaches Common Core State Standards CCSS.Math.Content.2.NBT.B.5 http://corestandards.org/Math/Content/2/NBT/B/5
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: Numbers can be decomposed and recombined many different ways. This lesson will build on and deepen students' understanding of decomposing and recombining numbers as a strategy to add. The task will allow students to model how an equation can be decomposed and written as an equivalent equation. Vocabulary: decompose, value, equation, equivalent, equal Special Materials: connecting cubes, base-ten blocks, ten frames (optional)