Lesson plan

Solve a one-step problem involving mass measurement by using division

teaches Common Core State Standards CCSS.Math.Content.3.MD.A.2 http://corestandards.org/Math/Content/3/MD/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Big Ideas: Mass is a measure of how much matter is in an object. Some situations are appropriate for estimating mass, while others require exact measurement. Some problems involving mass measurement can be solved by using division. This lesson builds on 2nd grade skills involving linear measurement. It is connected to 3rd grade use of multiplication in solving problems with measurement. In the task, students are asked to determine the number of shells each of her friends will get when she divides her collection into parts with equal mass. The lesson builds toward 4th grade skills including using all four operations for multi-step problems and working with measurement scales. Vocabulary: gram, kilogram, estimate, simple balance, scale, benchmark, division, divisor, dividend, quotient