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Alberta Education. The Alberta K–9 Mathematics Program of Studies with Achievement Indicators. Edmonton, AB: Alberta Education, 2007.
Frayer, D. A., W. C. Frederick and H. J. Klausmeier. A Schema for Testing the Level of Concept Mastery (Working Paper/Technical Report No. 16). Madison, WI: Research and Development Center for Cognitive Learning, University of Wisconsin, 1969.
Van de Walle, John A. and LouAnn H. Lovin. Teaching Student-Centered Mathematics: Grades 5–8. Boston, MA: Pearson Education, Inc., 2006.