Lesson plan

4. Compare length using indirect comparison (FP)

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.

This lesson helps to build fluency with comparing lengths of objects indirectly. Images and clues are used here because they allow students to build the relationships between direct and indirect comparison. 

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use transitivity, indirect comparison to compare length measurement.