Number Talk in 3rd Grade

Introduction

This tutorial provides a step-by-step guide to conducting a Number Talk focused on subtraction strategies in a 3rd grade classroom. Number Talks are a great way to encourage mathematical thinking and promote discussion among students. This lesson, modeled by instructional coach Donna Price, offers insights into effective teaching strategies that can enhance students' understanding of subtraction.

Step 1: Set Up the Environment for Number Talks

• Create a comfortable space for students to gather, allowing for open discussion.
• Ensure all students can see the problem being discussed, whether on a board or a screen.
• Encourage a respectful atmosphere where students feel safe to share their thoughts and methods.

Step 2: Introduce the Subtraction Problem

• Present a subtraction problem that is appropriate for 3rd graders, such as "56 - 19".
• Write the problem clearly on the board.
• Ask students to think about the problem silently for a moment before sharing their strategies.

Step 3: Encourage Student Participation

• Invite students to share their thinking one at a time, encouraging them to explain their reasoning.
• Use guiding questions to prompt deeper discussion:
  • "How did you arrive at that answer?"
  • "What strategy did you use?"
• Validate all responses to build confidence in students.

Step 4: Explore Different Strategies

• Highlight various subtraction strategies that students use, such as:
  • Counting back
  • Using number lines
  • Breaking apart numbers (decomposing)
• Write down each strategy on the board for visual reference.

Step 5: Engage in Discussion

• Facilitate a discussion comparing the different strategies presented.
• Ask students to consider the pros and cons of each method:
  • Which strategies are quicker?
  • Which ones are easier to understand?
• Encourage students to respect differing opinions and methods.

Step 6: Summarize Key Takeaways

• Conclude the Number Talk by summarizing the strategies discussed.
• Reinforce the idea that there is often more than one way to solve a problem.
• Encourage students to use these strategies in future subtraction tasks.

Conclusion

Number Talks can significantly enhance mathematical reasoning and collaboration among 3rd graders. By following these steps, educators can create an engaging environment where students explore subtraction strategies effectively. As a next step, consider integrating Number Talks into regular math instruction to further develop students' problem-solving skills and confidence in mathematics.