Lesson plan

Comparing quantities and percentages by using a model

teaches Common Core State Standards CCSS.Math.Content.6.NS.B.3 http://corestandards.org/Math/Content/6/NS/B/3
teaches Common Core State Standards CCSS.Math.Content.6.RP.A.3a http://corestandards.org/Math/Content/6/RP/A/3/a
teaches Common Core State Standards CCSS.Math.Content.6.RP.A.3c http://corestandards.org/Math/Content/6/RP/A/3/c
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: Percentages can often be useful to compare data. A percent can be used to compare a part to the whole or to compare two quantities. This lesson builds upon students' understanding of comparing quantities using ratios and rates. In this lesson, students decide whether rumors circulating about a major fire in Zilliontown are true or not by comparing these rumors with a newspaper article with similar information. This lesson builds toward calculating percent change in grade 7. Vocabulary: percent, ratio, rate, quantity Special Materials: Copy of handout Unifix cubes (optional) Base 10 blocks (optional) Grid paper (optional)