Lesson plan

Generate a whole with area models by composing unit fractions

teaches Common Core State Standards CCSS.Math.Content.3.G.A.2 http://corestandards.org/Math/Content/3/G/A/2
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.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 unit fraction is one of the equal shares that represents a whole. The denominator is the total number of equal shares in a whole and tells how many unit fractions are needed to generate the whole. This lesson builds on students’ work with partitioning area models and number lines into equal shares. These tasks involve a scenario at an art gallery where students will be creating and completing artwork with their knowledge of unit fractions and the whole. Students will be asked to complete and generate a whole using the given unit fractions. Students will be building and applying their foundational knowledge of fractions to compose a whole with unit fractions. The mathematical concepts in this lesson build toward students’ future work with composing and decomposing fractions, comparing fractions, and equivalent fractions. Vocabulary: fraction, unit fraction, whole, numerator, denominator Special Materials: Unit fractions (Supplemental handout)