# Rectangular Arrays

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In this lesson students will be able to recognize rows and columns in a rectangular array and generate an addition sentence to express the sum of the array. They will practice problems by making addition sentences with the row and column addends to reinforce the equality of the sums.

## Rectangular Arrays Lesson Plan Includes:

• Full Teacher Guidelines with Creative Teaching Ideas
• Instructional Content Pages about Rectangular Arrays
• Hands-on homework activities giving students practice on comparing and contrasting Rectangular Arrays
• Common Core State Standards

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### Description

In this lesson students will be able to recognize rows and columns in a rectangular array and generate an addition sentence to express the sum of the array. They will practice problems by making addition sentences with the row and column addends to reinforce the equality of the sums.

1. Begin by having students stretch out their arms to represent horizontal which is a row. Then have students stretch their arms up and down to represent vertical which is a column.
2. While reading the content pages, reinforce vocabulary and give students additional examples of rectangular arrays in order to help them practice the new material.  Use the additional resources to enhance understanding.
3. Introduce the notes on rectangular arrays. Have students practice problems.  Use the additional resources to enhance understanding.
4. Have students practice problems by making addition sentences with the row and column addends to reinforce the equality of the sums.
5. Follow Activity page with students. Have students work individually.  Provide paint to each group of students in various colors.  Have students use their Q-tip to make dots for each array.  Each row should be in a different color.
6. Distribute Practice page. Check and review the students’ responses as a class.
7. Distribute the Homework page. Have students share their answers with a shoulder partner at the beginning of the next class.
8. In closing, ask students to show with their arms the difference between a row and a column.
9. Allow for responses and discussion.

Common Core State Standards:

CCSS.Math.Content.2.OA.C.4

CCSS.Math.Content.3.OA.A.1

Class Sessions (45 minutes): 1 class