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Which One Doesn’t Belong!
Sarah VonEsh
1st grade
Chattahoochee Elementary School
Forsyth County Schools
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Task
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Overview
In this task, students will become familiar with the different ways to classify shapes by attributes (size, shape, color, number of sides). Students will self-select multiple shapes and classify them by a common attribute, and determine “which one doesn’t belong”.
Illustrative Task
Adapted from Math Connections: Linking Manipulatives and Critical Thinking by David J. Glatzer and Joyce Glatzer (1997) by Dale Seymour Publications.
- Use attribute blocks to combine and create different shapes.
- With a partner, look at the samples provided and decide which one does not belong.
- Discuss the reasons that you think a certain shape does not belong with the other three.
- With your partner, create your own set of shapes with one that doesn’t belong.
- Draw your puzzle problem to be included in a class book to share.
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GPS Addressed
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M1G2. Students will compare, contrast, and/or classify geometric shapes by the common attributes of position, shape, size, number of sides, and number of corners.
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Video Information
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Use these questions to guide your thinking about some of the important teacher ideas in the lesson featured in the video clip.
- What kinds of questions does the teacher ask to promote students’ problem solving?
- How is the teacher gauging students’ current understandings and building from those understandings?
- Consider the GPS standards listed with this video.
- What makes this lesson different from lessons you have taught on this topic?
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