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Lesson Plan

Compare fractions by reasoning about their size

teaches Common Core State Standards CCSS.Math.Content.3.NF.A.3 http://corestandards.org/Math/Content/3/NF/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Big Idea: Fractions must refer to the same size "whole" in order to be compared. This lessons builds on students' work with understanding the size of fractions. In the task, students are presented with a situation that requires them to think about how fractions must refer to the same sized whole in order to be compared. Students will be asked to compare different sized pizzas and look at different sized models. The mathematical concepts in this lesson builds towards students' future work with solving problems that involve comparing fractions with unlike numerators and unlike denominators. Vocabulary: fraction, equivalent, numerator, denominator, compare, reason Special Materials: manipulatives (as needed)
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