Lesson plan

6. Practice comparing lengths (FP)

teaches Common Core State Standards CCSS.Math.Content.2.MD.A.4 http://corestandards.org/Math/Content/2/MD/A/4
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
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Lesson objective: Measure the difference in length between two objects.

This lesson helps to build fluency with measuring length difference. A centimeter ruler is used here because it supports directly measuring differences. This work develops students' understanding that length difference can be measured.

Students engage in Mathematical Practice 6 (Attending to precision) as they precisely measure differences in length.

Key vocabulary:

  • difference

Special materials needed:

  • centimeter rulers
  • common classroom objects (See Game Directions in the Additional Materials tab for specifics.)
  • folders