Lesson plan

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

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.MP6 http://corestandards.org/Math/Practice/MP6

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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 multiplication. This lesson builds on 2nd grade skills involving linear measurement. It is connected to use of multiplication to solve problems with measurement in 3rd grade. In the task, students are asked to determine the maximum number of t-shirts that have a total mass of less than one kilogram for free shipping. The lesson builds toward 4th grade skills using all four operations for multi-step problems, including working with measurement scales. Vocabulary: gram, kilogram, estimate, simple balance, scale, benchmark, multiplication, factors