Lesson plan

Place a unit fraction on a number line by partitioning a whole into equal sized pieces

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.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 into which the whole should be partitioned. The numerator tells how many equal parts we are talking about. Fractions can be modeled using a number line. This lesson builds on students’ experiences with partitioning shapes into 2, 3, 4, 6, or 8 equal parts. The task focuses on students partitioning a number line and placing a unit fraction on the number line. Students are asked to draw a model, describe the model using math language, and write a fraction that represents the model. This builds toward students’ future work with multiple representations of fractions in grades 3-5. Vocabulary: unit fraction, denominator, numerator, whole, number line, partition, equal