Lesson plan

Estimate and measure mass by comparing units

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.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5

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Big Ideas: Mass is a measure of how much matter is in an object. There is a relationship between units of mass measurement. Some situations are appropriate for estimating mass, while others require exact measurement. This lesson builds on second-grade skills involving measuring in non-standard units and using benchmarks for estimation. The task asks students to estimate and compare amounts of cookie dough for an even trade. It builds toward using operations to solve one-step problems in third grade, and multi-step problems in fourth grade. These standards include using visual representations as well as algorithms. Vocabulary: mass, gram, kilogram, estimate, balance, scale, benchmark, measure Special Materials: simple balance scale weights