Lesson Plan

3. Understand indirect comparison of object attributes (C)

teaches Common Core State Standards CCSS.Math.Content.1.MD.A.1 http://corestandards.org/Math/Content/1/MD/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Compare lengths of objects both directly and indirectly.  Understand that if ​object A is longer than object B, and object B is longer than object C, then object A is longer than object C.

Students bring prior knowledge from K.MD.2 Directly compare two objects with a measurable attribute in common, to see which object has “more of”/”less of” the attribute, and describe the difference. This prior knowledge is extended to indirect comparison as students determine where students place in a jumping contest. A conceptual challenge students may encounter is thinking of this abstractly.  Students will need pictures and/or objects to help with this concept. 

The concept is developed through work with students determining where students land based on direct comparision of a jump rope. From this information, an indirect comparison can be made with the distance of all students' jumps. 

This work helps students deepen their understanding of number because numbers (quantities) can also be compared directly and indirectly.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use transitivity, indirect comparison to compare the distance of students' jumps and the length of a jump rope.

Key vocabulary:

  • distance
  • direct
  • indirect
  • length

Special materials needed:

  • scissors
  • colored manipulatives (pink, blue, green)
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