Endnotes
1. This paragraph was taken from a PowerPoint written by Dr. Robin Ittigson Math Supervisor of the Pittsburgh Public Schools for a curriculum writing seminar
2. (Learning mathematics pg112)
3. (Zelman, Bell)
4. (TERC, Tierney)
5. http://dimacs.rutgers.edu/nj_math_coalition/framework/ch10/ch10_03-04.html
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