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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–9 Resource. 2nd ed. Sausalito, CA: Math Solutions Publications, 2000.
Fosnot, Catherine Twomey and Maarten Dolk. Young Mathematicians at Work: Constructing Number Sense, Addition, and Subtraction. Portsmouth, NH: Heinemann, 2001.
Sakshaug, Lynae, Melfried Olson and Judith Olson. Children Are Mathematical Problem Solvers. Reston, VA: NCTM, 2002.
Van de Walle, John A. and Sandra Folk. Elementary and Middle School Mathematics: Teaching Developmentally. Canadian ed. Toronto, ON: Pearson Education Canada Inc., 2005.