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topic C
4 hours

Halves, Thirds, and Fourths of Circles and Rectangles


Description

Topic C focuses on partitioning circles and rectangles into equal fractional parts. In Lesson 9, students are first introduced to partitioning shapes into two equal shares, or halves, using both circles and rectangles. Lesson 10 continues the same process with fourths and thirds. In Lesson 11, students build upon their new knowledge by assembling a whole out of fractional parts. Given a circle made of two parts, students will see that the whole circle is composed of 2 halves. Topic C concludes with Lesson 12, in which students learn that equal parts of a rectangle can have different shapes. This topic provides a foundation for Topic D, applying what students have learned about fractional parts of a circle, particularly halves and quarters, to telling time on an analog clock.

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Credits

From EngageNY.org of the New York State Education Department. Grade 2 Mathematics Module 8, Topic C. Available from engageny.org/resource/grade-2-mathematics-module-8-topic-c; accessed 2015-05-29.
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