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Lesson Plan

Compare fractions with like denominators by ordering them from greatest to least

teaches Common Core State Standards CCSS.Math.Practice.MP1
teaches Common Core State Standards CCSS.Math.Content.3.NF.A.3d
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP3
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Big Ideas: Fractions with like numerators can be compared by ordering them from least to greatest, or greatest to least. The symbols , and = can be used to explain how fractions compare to each other. Fractions can be modeled in multiple ways. This lesson builds on students' work with fractions. In this lesson, students are asked to compare fractional amounts and reason about the size of the fractions. In the task, the scenario involves swimmers swimming laps in a pool. Focusing on like denominators, students are asked to compare the fractional amounts of the laps swam by each swimmer and order the fractions from greatest to least. Students must reason about the size of the fractions to determine the order in which the fractions should be listed. The mathematical concepts in this lesson build towards students' future work with solving problems that involve ordering fractions and comparing fractions with unlike numerators and unlike denominators. Vocabulary: number line, fraction, equivalent, numerator, denominator, compare, reason, symbols (, =), model Special Materials: Manipulatives (as needed) number line
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