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What to create	Lesson plan
Which subject	Science
What topic	Use the commutative property to count on from the larger addend
What length (min)	30
What age group	Doesn't matter
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Lesson Plan: Using the Commutative Property to Count On from the Larger Addend

Subject: Science

Topic: Use the Commutative Property to Count On from the Larger Addend

Duration: 30 Minutes

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Objectives

By the end of this lesson, students will be able to:

1. Understand the commutative property of addition.
2. Apply the commutative property to count on from the larger addend.
3. Solve addition problems efficiently using the commutative property.

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Materials Needed

• Whiteboard and markers
• Number cards (1-10)
• Worksheets with addition problems
• Counters (optional for hands-on activities)

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Introduction (5 Minutes)

1. Engage Students: Begin by asking students, "What do you think happens when we change the order of the numbers in an addition problem?" Write a few examples on the board, such as:

   • 3 + 5
   • 5 + 3

2. Explain the Concept: Introduce the commutative property of addition, stating that changing the order of the addends does not change the sum. Provide additional examples to clarify.

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Direct Instruction (10 Minutes)

1. Definition: Clearly define the commutative property of addition:

   • Commutative Property: For any numbers a and b, ( a + b = b + a ).

2. Demonstration: Use number cards to demonstrate counting on from the larger addend. For example:

   • Show 7 + 4: Start with 7 and count up 4 more: 8, 9, 10, 11.
   • Compare this with 4 + 7 by starting with 4 and counting up: 5, 6, 7, 8, 9, 10, 11 (Emphasizing that starting from the larger number can make counting easier).

3. Illustrate with Real-Life Examples: Provide examples of how this property can be used in practical scenarios, such as when adding lengths, weights, or other measurements in science.

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Guided Practice (10 Minutes)

1. Interactive Activity: Group students into pairs and provide them with number cards. Ask them to create their own addition problems using the commutative property.

2. Counting On Together: Encourage pairs to practice counting on from the larger addend. Circulate the classroom to provide support and assess understanding.

3. Class Sharing: After practice, ask a few pairs to share their problems and demonstrate how they counted on from the larger number.

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Independent Practice (5 Minutes)

1. Worksheets: Distribute worksheets containing various addition problems. Each problem should encourage the use of the commutative property. Students will:

   • Solve the addition problems.
   • Identify the larger addend in each problem.
   • Count on from that number to find the sum.

2. Support: Provide assistance as needed and encourage students to discuss strategies with one another.

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Closure (5 Minutes)

1. Summarize the Key Points: Recap what students have learned about the commutative property and its importance in making addition easier.

2. Exit Ticket: Ask each student to write down one example of an addition problem where they can apply the commutative property and explain why it's useful.

3. Homework Assignment: Assign additional practice problems for homework, encouraging students to use the commutative property to help them with their work.

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Assessment

• Informal observation during guided practice and pair work.
• Review completed worksheets to assess understanding.
• Evaluate exit tickets for comprehension of the commutative property.

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Standards Alignment

This lesson aligns with the following U.S. educational standards for mathematics and science:

• Common Core State Standards (CCSS) for Mathematics: Operations and Algebraic Thinking (2.OA)
• Next Generation Science Standards (NGSS): Engaging students in the practices of using mathematical representations to understand phenomena and design solutions.

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This lesson plan aims to create a supportive and engaging learning environment, allowing students to explore mathematical concepts that intersect with scientific reasoning.