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Lesson Plan

Compare fractions with like numerators by using models to order them based on size

teaches Common Core State Standards 3.3H
teaches Common Core State Standards 3.NS.8
teaches Common Core State Standards CCSS.Math.Content.3.NF.A.3d
teaches Common Core State Standards CCSS.Math.Practice.MP5
teaches Common Core State Standards CCSS.Math.Practice.MP4
teaches Common Core State Standards CCSS.Math.Practice.MP1
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Big Ideas: Fraction models can be used to justify comparisons. Fractions can be compared using the symbols , or =. Fractions can be compared by ordering them from least to greatest or greatest to least. This lessons builds on students' work with understanding the size of fractions. In the task, students are presented with a child who starts her own recycling program at school. Students will decide which bin must be emptied first by deciding which one is the most full. Students are asked to compare the fractional amounts to properly order them. To do this, they must reason about the size of the fractions. The mathematical concepts in this lesson build towards students' future work with solving problems that involve comparing fractions with unlike numerators and unlike denominators. Vocabulary: fraction, equivalent, numerator, denominator, compare, reason, symbols Special Materials: manipulatives (as needed)
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