Lesson plan

Compare and convert units of time by creating conversion tables

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.1 http://corestandards.org/Math/Content/4/MD/A/1
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.1 http://corestandards.org/Math/Content/4/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3

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Big Ideas: The same measurement value can be represented in multiple ways (e.g. 2 minutes = 120 seconds). Units of measurement can be compared by their relative values. Multiplicative comparisons show the relationship between units of measurement (1 minute is 60 times as much as 1 second, 1 pound is 16 times as much as 1 ounce, 1 foot is 12 times as much as 1 inch). In this lesson, students use a conversion table to solve problems with time. In third grade, students calculated elapsed time by using minutes. Seconds is a new unit of measurement for students; they should continue to refer to their benchmark actions from Lesson 1 to understand the length of time of 1 minute and 1 second. Conversion tables will also be used to reinforce the multiplicative comparison of the two units of measurement. Vocabulary: second Special Materials: < Include any materials needed for the lesson here >