Common Core Math Proportional Reasoning Grades 6 and 7 RP

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6th, 7th
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A scaffolded lesson of 13 Activity pages that builds on students' connections between "easy" multiplication and division to reason and make sense of proportions.
Students are taken from recognizing "scale factor" in simple fractions, to using scale factors to look for clues that help them to reason about proportions. "Cross multiply and divide" is a rule that has the unintended effect of removing reasoning and number sense development from the classroom.
This method of looking at proportions is more consistent with the Common Core standards and the ways that sense-making is applied to a typically "hard-to-understand" area of middle school mathematics.
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Common Core Math Proportional Reasoning Grades 6 and 7 RP
Common Core Math Proportional Reasoning Grades 6 and 7 RP
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