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Alberta Education. The Alberta K–9 Mathematics Program of Studies with Achievement Indicators. Edmonton, AB: Alberta Education, 2007.
Burns, Marilyn. About Teaching Mathematics: A K–8 Resource. 2nd ed. Sausalito, CA: Math Solutions Publications, 2000.
National Council of Teachers of Mathematics."Archimedes' Puzzle."
NCTM Illuminations. 2000–2008. http://illuminations.nctm.org/LessonDetail.aspx?id=L720 (Accessed April 25, 2008).
. Principles and Standards for School Mathematics. Reston, VA: NCTM, 2000.
Van de Walle, John A. Elementary and Middle School Mathematics: Teaching Developmentally. 4th ed. Boston, MA: Addison Wesley Longman, Inc., 2001.
Van de Walle, John A. and LouAnn H. Lovin. Teaching Student-Centered Mathematics: Grades 5–8. Boston, MA: Pearson Education, Inc., 2006.