Lesson plan

Express the area of each part of a shape as a unit fraction by identifying the total equal groups into which the shape is partitioned

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.MP3 http://corestandards.org/Math/Practice/MP3
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 describes the division of a whole into equal parts. The denominator in a fraction tells how many equal parts the whole or unit is divided into. The numerator tells how many equal parts you are talking about. This lesson builds on students' understanding that we can partition shapes into equal groups. The task extends students' understanding of area models and helps students conceptualize the big idea that, when partitioning a given shape into equal parts, these parts all have the same area. In this lesson, students will understand that a fraction names a part of a whole and can be represented using an area model. In this lesson students will explore the definitions of denominator and numerator and will write unit fractions to represent area models. The mathematical concepts in this lesson build toward students’ future work with fractions in grades 3-5. Vocabulary: fraction, unit fraction, numerator, denominator, equal, part, whole, partition, area