Task Teacher Guide
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Through This Assessment Opportunity…
Students will be exploring a different problem type: part whole with addends unknown. This situation will demonstrate the part whole relationship in connection with addition and subtraction.
Intentionality…
This lesson builds off the Day 4 math talk. Students will start to exploring the relationship between addition and subtraction through missing addend questions. The students will engage in a math talk, investigate a new task and a game or small group activity.
This lesson will serve to develop a deeper understanding of the following big ideas:
- Addition names the whole in terms of the parts: when the parts of a set are known we call it addition
- The part whole relationship is connected to addition as numbers are composed of two or more parts
- Addition can be used in action (or active) situations (i.e.: joining and separating) and static (or passive) situations (i.e.: part part whole)
- Different addition situations will elicit different strategies
- Number relationships provide the foundation for strategies to help students remember basic facts
- Student estimation of small amounts and understanding of quantity as the amount of objects
- Using the part whole model to understand the unknown parts of a problem. The unknown identified which operation needs to be used to solve the problem
- Provide students an opportunity to visualize a situation then interpret which operation is needed to solve word problems
- Models can be used to connect concrete to abstract
- Explore addition strategies and provide opportunities for students to move from “direct modelling and counting all” to using counting on as a strategy to solve an addition question. Counting on is an important development as students work with bigger numbers, so they don’t have to model both numbers in the question
Math Talk
String of Related Problems
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Visual Number Talk Prompt #1
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Visual Number Talk Prompt #2
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Visual Number Talk Prompt #3
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Visual Number Talk Prompt #4
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Visual Number Talk Prompt #5
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Spark
What Do You Notice? What Do You Wonder?
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Estimation: Prompt
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Estimation: Reveal
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Sense Making
Crafting A Productive Struggle: Prompt
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During Moves
While Students Are Productively Struggling…
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Student Approach #1: Direct Modelling and Counting All
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Student Approach #2: Counting on
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Student Approach #3: Part-whole mat presentation
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Student Approach #4: Known Fact: Doubles +1
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Igniting Your Next Moves
Consolidation: Making Connections
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Reveal
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Purposeful Practice
While Students Are Practicing…
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Purposeful Practice: Small group activity
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Looking Ahead: What To Do Next?
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Resources and Downloads
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Explore The Entire Unit of Study
This Make Math Moments Task was designed to spark curiosity for a multi-day unit of study with built in purposeful practice, and extensions to elicit and emerge mathematical models and strategies. Click the links at the top of this task to head to the other related lessons created for this unit of study.Visual Number Talk Prompt #1
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Visual Number Talk Prompt #2
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Visual Number Talk Prompt #3
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Visual Number Talk Prompt #4
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Visual Number Talk Prompt #5
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What Do You Notice? What Do You Wonder?
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Spark Image
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Estimation Prompt: Image
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Estimation Reveal: Video
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Estimation Reveal: Image
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Purposeful Practice Stations and Small Group Instruction
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