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Perimeter.

This is a lesson I taught to a 3rd grade class. We used the geoboards as a manipulative and guide. I used an overhead transparent geoboard and allowed the students a chance to come up to the board for practice.

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Temperature.

This is a lesson I taught to 3rd graders as well. This was a great cooperative group lesson. Here are the worksheets, etc...that go with this lesson

Temp. Worksheet.