Lesson plan

Solve time measurement word problems by converting from a larger unit to a smaller unit

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.2 http://corestandards.org/Math/Content/4/MD/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: When solving time measurement word problems, measurement units need to be converted to the same unit before calculating. We must consider the number and the unit when we are comparing measurements. This lesson builds on students’ previous work with time problem solving in grade three. This task explores time conversions through word problems. Students will convert from a larger unit to a smaller unit to compare different amounts of time spent playing various games at an arcade. Students will discover they must convert to the same unit before making comparisons. The mathematical concepts in this lesson builds towards students’ future work with measurement problem solving in grade 5. Vocabulary: second, minute, hour, diagram Special Materials: Formative Assessment Handout (optional-see Supplementary Resources at end of lesson plan)