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Lesson Plan

5. Partition shapes into halves and quarters (A)

teaches Common Core State Standards 1.G.4
teaches Common Core State Standards CCSS.Math.Content.1.G.A.3
teaches Common Core State Standards CCSS.Math.Practice.MP3
teaches Common Core State Standards MAFS.1.G.1.3
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Lesson objective: Apply knowledge of partitioning shapes into halves and fourths to solve a real-world problem.

This lesson provides an opportunity for students to apply their knowledge and understanding of partitioning shapes into halves and fourths to a real-life situation. Students are asked to help a student partition her garden in an attempt to plant four different vegetables equally.

Key Concept students will use: 

  • Shapes, like rectangles, can be partitioned into four smaller equal shares, and the whole is described as four of the smaller equal shares.

Skills students will use:

  • Model and compose shapes (Grade K, Unit 15)
  • Partition shapes into four equal parts, called fourths
  • Partition shapes into two equal parts, called halves

Students engage in Mathematical Practice 3 (construct viable arguments) as they construct arguments about their own partitioning, but also distinguish correct reasoning from that which is flawed.

Key vocabulary: 

  • equal shares
  • fourths
  • partition

Special materials needed:

  • pattern blocks
  • shape cut-outs
  • tangrams

Related content

Appears in

Finding equal shares of shapes

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