Lesson plan

Prove that a number is even or odd by writing and testing equations

teaches Common Core State Standards CCSS.Math.Content.2.OA.C.3 http://corestandards.org/Math/Content/2/OA/C/3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: A combination of addends can produce a predictable even or odd sum: even + even = even, odd + odd = even, and even + odd = odd. This lesson builds on students' work with even and odd numbers and addition equations. The tasks ask them to add the letters in names to determine if the number is odd or even. Students will understand the concept of how even sums are derived from even and odd addends. This lesson builds toward students' future work with multiplication. Vocabulary: even, odd, addend, sum, equal, equation Special Materials: counters