Lesson plan

3. Apply understanding of multiplicative comparisons in different types of problems (A)

teaches Common Core State Standards CCSS.Math.Content.4.OA.A.2 http://corestandards.org/Math/Content/4/OA/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
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Lesson objective: Apply understanding of multiplicative comparisons in different types of problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparisons to a real-life situation. Students are asked to figure out the cost of activities at a carnival and make a plan for how 1,500 points could be used.

Key Concept students will use: 

  • the meaning of multiplicative comparison does not change depending on the type of problem being solved or the units involved (in measurement problems)

Skills students will use:

  • distinguishing between additive and multiplicative comparison
  • modeling additive and multiplicative comparisons to find different unknowns
  • using all four operations to create a plan for how points will be spent

Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they analyze given information and use it to create a solution pathway to find unknowns.

Key vocabulary: 

  • additive comparison
  • equation
  • group size
  • multiplicative comparison
  • number of groups
  • product
  • tape diagram