Lesson plan

7. Find parts to make a whole (A)

teaches Common Core State Standards CCSS.Math.Content.2.G.A.3 http://corestandards.org/Math/Content/2/G/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
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Lesson objective: Identify equal parts and combine them to create a whole shape.

This lesson provides an opportunity for students to apply their knowledge and understanding of equal parts to a mathematical situation. Students are asked to work with a partner or group to find all of the parts that are equal. Students then combine those equal parts to make a whole shape. 

Key Concept students will use: 

  • Shapes can be partitioned into equal parts; a whole can be divided into equal parts such as two halves, three thirds, or four quarters/fourths.

Skills students will use:

  • Knowledge of halves and fourths (Grade 1, Unit 17)
  • Knowledge of thirds

Students engage in Mathematical Practice 2 (Reason abstractly and quantitatively) as they combine equal parts to create whole shapes.

Key vocabulary: 

  • equal
  • fourth
  • half
  • part
  • third

Special materials needed:

  • game pieces (prepared ahead of time)
  • recording sheet
  • scissors