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Tool: Pan Balance - Shapes (Fixed Values)
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Go to: http://illuminations.nctm.org/ActivityDetail.aspx?ID=131 (opens a new window)
Description: This double pan balance, created for use by participants in the PreK‑2 Algebra E‑Workshop, is a special version of the Pan Balance - Shapes applet. It uses numbers that are friendly for primary classrooms.
Technology Type: Java Applet 
Author: NCTM Illuminations
Language: English 
Cost: Does not require payment for use

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Courses: Math 5 Algebra and expressions, Representations, Ratio and proportion
Math 6 Algebra and expressions, Representations, Ratio and proportion
Math 7 Visualize, Representations, Ratio and proportion

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Comment:This tool is a good place to begin some algebraic reasoning!!!