Lesson plan

3. Understanding that multiplication has the same meaning when we put together equal groups of liters, grams, or kilograms. (A)

  • From K-5 Math Companion Curriculum
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teaches Common Core State Standards 3.MD.A.2 http://corestandards.org/Math/Content/3/MD/A/2
teaches Common Core State Standards 3.OA.A.3 http://corestandards.org/Math/Content/3/OA/A/3
teaches Common Core State Standards MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards MP5 http://corestandards.org/Math/Practice/MP5
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Lesson objective: Apply multiplication to put together equal groups of grams, meters, or liters. 

This lesson provides an opportunity for students to apply their knowledge and understanding of multiplication to a mathematical situation. Students are asked to figure out how much weight 3 ants lifted on field day and determine who got 1st, 2nd, and 3rd place. 

Key Concept students will use: 

  • We can use multiplication to solve problems involving measurement quantities (including liquid volumes and masses of objects).

Skills students will use:

  • Using arrays for foundations for multiplication (Grade 2, Unit 13)
  • Exploring equal groups as a foundation for multiplication and division (Grade 3, Unit 1)
  • Understanding the relationship between multiplication and division (Grade 3, Unit 7)
  • Developing strategies for multiplication and division (Grade 3, Unit 9)

Students engage in Mathematical Practice 1 (Make sense of problems and persevere in solving them) as students will have to make sense of this problem and persevere in solving it as it is a three-step problem. Students may use number lines, tape diagrams, repeated addition, drawing pictures, equations, or some other strategy to solve. 

Key vocabulary: 

  • equal groups
  • multiplication
  • number line
  • tape diagram