Lesson plan

4. Solve problems by distinguishing between area and perimeter (A)

teaches Common Core State Standards CCSS.Math.Content.3.MD.D.8 http://corestandards.org/Math/Content/3/MD/D/8
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
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Lesson objective: Solve problems that require students to distinguish between area and perimeter.

This lesson provides an opportunity for students to apply their knowledge and understanding of area and perimeter to a real-life situation. Students are asked to help Mr. Nelson decide which pool to buy.

Key Concept students will use: 

  • perimeter is a linear attribute of plane figures and can be distinguished from area

Skills students will use:

  • finding area of a figure (Grade 3, Unit 2)
  • finding the perimeter of a figure (Grade 3, Unit 3)

Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they determine whether the concept of area or perimeter applies, and then calculate those measures.

Key vocabulary: 

  • area
  • perimeter
  • length
  • width