Making Maths Fun

Overview

This lesson plan introduces the concept of addition to Year 3 students in compliance with the Ontario Curriculum – Mathematics, Grade 3, Number Sense and Numeration strand, specifically addressing:

• Outcome B1.1: Use place value to describe, represent, and solve problems involving addition up to 1,000.

The lesson is designed to help students understand addition through hands-on activities, group collaboration, and individual challenges. It provides differentiation for varying ability levels to ensure an engaging and inclusive experience.

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Learning Objectives

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

1. Understand and model addition as the combination of parts to form a whole.
2. Solve addition problems by regrouping and using place value concepts.
3. Work collaboratively and explain the reasoning for their solutions to peers and the teacher.

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Materials Needed

1. Base-ten blocks (ones, tens, and hundreds).
2. A large magnetic whiteboard and markers.
3. Individual whiteboards for students with markers and erasers.
4. Pre-cut paper "pizza slices" (15 sets of 8 slices).
5. Addition equation cards (each card has an addition question such as "345 + 289").
6. Celebratory stickers (or gold stars).

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Lesson Breakdown

1. Warm-Up (10 Minutes)

Objective: Activating prior knowledge and introducing addition terminology.

1. Begin with the question: "How do we combine things in everyday life?"
   • Possible responses: Adding friends to a game, stacking books, counting candies.
2. Write the word “Addition” in large letters on the whiteboard and discuss:
   • Adding means joining two groups of numbers together to make something bigger.
3. Pose simple mental math questions:
   • E.g., "What is 12 + 5?" and "What is 8 + 7?"
   • Call on students to solve these aloud. Ensure these are within their comfort zone to build confidence.

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2. Mini-Lesson (15 Minutes)

Objective: Building conceptual understanding of addition with place value and regrouping.

1. Demonstrate a two-digit addition problem using base-ten blocks. Example:
   • Write 37 + 45 on the whiteboard.
   • Use base-ten blocks to represent each number (3 tens and 7 ones, 4 tens and 5 ones).
     • Combine the ones first: 7 + 5 = 12 (regroup into 1 ten and 2 ones).
     • Then combine the tens: 3 + 4 + 1 (from regrouping) = 8 tens.
     • Answer: 82.
2. Guide students step-by-step and ask questions:
   • "How do we regroup the 12 ones?"
   • "Can someone help me write this on the board?"
3. Move to a three-digit problem: 127 + 458.
   • Follow a similar pattern (use blocks to explain regrouping for tens and hundreds).

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3. Guided Practice (15 Minutes)

Objective: Scaffolded group work using manipulatives.

1. Split the class into 4 groups (5 students each).
   • Each group gets a tray with base-ten blocks and an envelope of addition equation cards.
2. Start with a simpler problem: Example, 234 + 123.
   • Each group works together to show the solution using blocks first, then writing it on their mini whiteboards.
3. Rotate around the room to observe and prompt with guiding questions:
   • "What should we combine first—ones, tens, or hundreds?"
   • "Do you need to regroup here?"
4. Gradually increase difficulty. Example: 367 + 489 introduces double regrouping.
   • Groups explain how they regrouped to solve.

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4. Application Activity: Pizza Parlour (15 Minutes)

Objective: Independent and creative problem-solving through a real-world scenario.

1. Announce: "Now you’re pizza shop owners!"
   • Hand out pre-cut paper "pizza slices" (sets of 8 slices per small pizza).
2. Present the problem on the board:
   • "You’re preparing a large order! One customer asks for 356 slices, and another asks for 289 slices. How many slices do you need in total?"
3. Students work individually to solve the question independently in their notebooks.
   • They can use drawings (like grouping and regrouping the pizza slices) or numbers to solve.
4. Once finished:
   • Call for volunteers to explain their solutions to the class. Reward creative approaches with celebratory stickers!

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5. Wrap-Up and Exit Ticket (5 Minutes)

Objective: Reflect on learning; assess understanding.

1. Bring the class together and ask:
   • "What did you learn about addition today?"
   • "Why is regrouping important?"
2. Distribute exit tickets with a single problem to solve:
   • Example: 423 + 148. Ask students to write their answer and hand it in as they leave.
3. Collect and review exit tickets to evaluate student progress and inform tomorrow's lesson.

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Assessment Opportunities

• Observation: Monitor group discussions during guided practice to assess understanding of regrouping.
• Exit Tickets: Use as a formative assessment to gauge individual mastery of addition.
• Student Explanations: Listen for clarity of thought and use of correct terminology during volunteer sharing.

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Differentiation Strategies

• For advanced learners: Provide larger numbers for addition problems (e.g., 534 + 736) and challenge them to explain the process in detail.
• For learners needing support: Offer simpler problems and use additional manipulatives or drawings to guide their thinking. Work closely with them in small groups for reassurance.

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Reflection for Teachers

• Did students grasp the concept of regrouping through hands-on activities?
• Were the materials engaging and age-appropriate?
• How well did groups collaborate and communicate?
• Use these insights to adjust future lessons on subtraction or multiplication.

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Closing Thought

This lesson introduces addition in an interactive and creative way that’s rooted in real-world connections, hands-on learning, and collaboration. Students will leave with a stronger grasp of the concept and a positive attitude towards maths!