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Lesson Plan

Partition, label, and identify equal shares by using a number line

teaches Common Core State Standards CCSS.Math.Content.3.NF.A.1 http://corestandards.org/Math/Content/3/NF/A/1
teaches Common Core State Standards CCSS.Math.Content.3.NF.A.2a http://corestandards.org/Math/Content/3/NF/A/2/a
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
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Big Ideas: A fraction represents the division of a whole into equal shares. The denominator is represented by the number of segments on a number line between two whole numbers. This lesson builds on students’ work with partitioning area models of wholes into equal shares. This task requires students to recognize whether number lines were partitioned correctly, justify their reasoning, and partition number lines on their own. Students will be building the foundations of fraction sense on a number line by representing, partitioning, and labeling equal shares. The mathematical concepts in this lesson build toward students’ future work with composing, decomposing, and identifying specific fractions on number lines as well as future work with comparing and equivalent fractions. Vocabulary: number line, line segments, fraction, numerator, denominator, halves, thirds, fourths, sixths, eighths Special Materials: Problems, Number Lines, and Blank Number Lines (Supplemental Handout) Ribbon, string, or yarn (optional) Grid paper (optional)
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