# 7. Create arrays (A)

teaches Common Core State Standards CCSS.Math.Content.2.OA.C.4 http://corestandards.org/Math/Content/2/OA/C/4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Apply their knowledge about arrays to find the total number of objects in a set.

This lesson provides an opportunity for students to apply their knowledge and understanding of arrays to a real-life situation. Students are asked to help find the total number of jellybeans in a jar.

Key Concept students will use:

• A group of objects can be organized in an array and thought of as a number of equal groups.

Skills students will use:

• addition to find the total number of objects in an array and naturally point out a connection to skip counting (Grade 2, Unit 8)

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they understand the structure of an array (rows & columns).

Key vocabulary:

• arrange
• array
• column
• equal
• group
• objects
• row

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