Lesson plan

8. Pizza puzzle: Comparing with like denominators (A)

teaches Common Core State Standards CCSS.Math.Content.3.NF.A.3 http://corestandards.org/Math/Content/3/NF/A/3
teaches Common Core State Standards CCSS.Math.Content.3.NF.A.3d http://corestandards.org/Math/Content/3/NF/A/3/d
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
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Lesson objective: Apply understanding of comparing fractions with like denominators to find fractions greater than or less than a given fraction.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparing fractions to a real-life situation. Students are asked to help with a pizza order based on the likes and dislikes of the people ordering.

Key Concept students will use: 

  • comparing fractions

Skills students will use:

  • Interpreting fractions as numbers
  • Reasoning about the size of the pieces

Students engage in Mathematical Practice 3 (Construct viable arguements and critique the reasoning of others) as they work to determine which selections best meet the needs of the customers based on the fractions that must be compared and explain their thinking to others.

Key vocabulary: 

  • area model
  • compare
  • denominator
  • number line
  • numerator
  • tape diagram

Special materials needed:

  • fraction strips
  • paper
  • pencil