### Jennifer SlichterSanta Rosa District Schools

#### Description

This is an interesting lesson on addition that encourages class participation through role-play and concrete hands-on activity. Students practice putting two sets together to form a new set.

#### Objectives

The student demonstrates an awareness of addition and subtraction in everyday activities (using concrete objects, models, drawings, role playing).

#### Materials

-Dry erase board
-Pocket chart
-Pocket chart
-Sentence strips (See Preparations)
-Unifix cubes

#### Preparations

1. Prepare ladybug cutouts with various numbers of dots on the left and right sides of the body. (See Associated File for examples)
2. Prepare sentence strips as follows: “My ladybug has __dots on the left side and __ dots on the right side. My ladybug has ___ dots in all.”
3. Gather materials for activity.
4. Make copies of the Ladybug Addition Worksheet, one per student. (See Associated File)

#### Procedures

NOTE: This lesson primarily focuses on adding whole numbers together.

1. Hold up the stuffed toy ladybug and ask students if they know what this insect is called. Discuss ways that ladybugs help farmers.

2. Tell students that we are going to pretend we have pet ladybugs in the room today. We are going to practice counting them to find out how many we have in all.

3. Role-play an example of putting two sets together. Students pretend they are ladybugs. Ask 4 children to stand on the left-hand side of the room and 2 children to stand on the right-hand side of the room. Practice combining the two groups together to determine how many children there are in all.

4. Tell students that we are going to play a game involving ladybugs.

5. Hold up the stuffed ladybug and show students how the ladybug has dots on the left side and dots on the right side of the body.

6. Introduce the ladybug game activity. Explain that several ladybug cutouts will be passed out to different individuals in the class. Individual students will be chosen to come to the front of the room to show the class how many dots their “pet” ladybug has on the left side of the body and how many dots their “pet” ladybug has on the right side of the body.

7. Students take turns coming to the front of the room to make number sentences using the dots on the ladybug. Students read the sentence strips on the board that say “My ladybug has ___ dots on the left side and ___ dots on the right side. My ladybug has ___ dots in all.” The students fill in the blank with the correct answer. If they get the answer correct, they may put an X or O on the tick-tack-toe board. (X represents the boys and O represents the girls.)

8. Students review the addition facts practiced during the ladybug game using flashcards.

9. Pass out unifix cubes.

10. Students complete the Ladybug Addition Worksheet (See Associated File) on their own using cubes as a manipulative.

11. Assist and circulate to help students having difficulty.

12. When students have completed the worksheet, have individual students share their answers. As students are sharing their answers, draw the ladybugs on the board from the Ladybug Addition Worksheet to provide a visual for the problem. Provide appropriate feedback as necessary.

13. Ask students what they learned about addition. Remind the class that addition is an act of combining two sets together to form a new set.

#### Assessments

NOTE: This lesson focuses on adding whole numbers.

This is a formative assessment using concrete objects to solve addition problems.
Students demonstrate an ability to use manipulatives to solve addition problems and write answers on the fill-in-the-blank worksheet. An answer key is used to mark answers on the worksheet. Appropriate feedback is provided to all students. Students who miss two or more answers should be given more instruction and another opportunity to demonstrate their ability to use manipulatives to solve addition problems.