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Lesson Plan

Milkshake Ratios: Connected Solution Paths

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teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2 http://corestandards.org/Math/Content/7/RP/A/2
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2a http://corestandards.org/Math/Content/7/RP/A/2/a
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Students will understand that ratios, percents, and fractions can be used to compare the relationship between two variables. Students will compare three sizes of milkshakes and determine which shake is the most chocolatey. The suggested public discussion of student work shows connected solution paths. Students may notice that in order to compare the chocolatey-ness, we need to find something in common about the recipes. Three pieces of work are shown. The first shows a student's use of percents to compare the three shakes. The second shows a student's knowledge of unit rates to compare the three shakes. The third shows the student's use of common denominators and least common multiples to compare the three shakes. This Student Work Discussion Plan was created by a member of the 2015 Delaware Dream Team.
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