Lesson plan

Recognizing equal shares by partitioning circles and rectangles in different ways

teaches Common Core State Standards CCSS.Math.Content.2.G.A.3 http://corestandards.org/Math/Content/2/G/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3

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Big Ideas: Geometric attributes (such as sides and angles) give descriptive information about a shape’s properties and orientation, which supports visualization and problem solving when partitioning shapes into smaller, equal shares. In this lesson, students will learn to identify equal and unequal shares of a partitioned shape. Students recognize that shapes can partitioned into smaller pieces, and should have equal shares. This lesson builds on students' prior knowledge of geometric shape names and their definite geometric attributes, such as lines and angles, as well as understanding that shapes can be composed and decomposed of several individual shapes. In this task students are asked to identify whether a shapes has been partitioned into equal or unequal shares. Students engage in a fun maze activity that allows students to recognize shapes that have been partitioned into equal shares. This lesson sets the foundation for partitioning circles and rectangles into halves, thirds, and fourths. Vocabulary: partition, equal, equal shares, compose, decompose Special Materials: copy of the maze