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Lesson Plan

Write equations to find the sum of equal groups by making equal rows and columns

teaches Common Core State Standards CCSS.Math.Content.2.G.A.2
teaches Common Core State Standards CCSS.Math.Content.2.OA.C.4
teaches Common Core State Standards CCSS.Math.Practice.MP7
teaches Common Core State Standards CCSS.Math.Practice.MP4
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Big Ideas: Objects can be arranged into row and columns creating equal-sized units. There may be more than one way to partition a rectangle to make an array with the same number of squares. An addition equation can prove how many equal squares are in the partitioned rectangle. This lesson builds on students' work with partitioning rectangles. In this lesson, students will use clues to arrange cookies on a cookie sheet. Students will understand how to arrange objects in equal rows and columns and write repeated addition equations to describe those rows and columns. This lesson builds towards students' work with multiplication. Vocabulary: repeated addition, equation, arrays, rows, columns, partition Special Materials: square tiles spinner numbered 1 - 5
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