1. National Council of Teachers of Mathematics. (2000). Principles and Standards for School Mathematics, Chapter 4: Standards for Grades Pre-K-2. Reston, VA: NCTM.

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2. Conference Board of the Mathematical Sciences. (2001). The Mathematical Education of Teachers, Chapters 1-3. Washington, D.C.: The Mathematical Association of America.

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3. Becker, J.P., & Selter C. (1996). Elementary School Practices. In A.J. Bishop et al. (eds)., International Handbook of Mathematics Education, 511-564. Dordrecht, The Netherlands: Kluwer Academic Publishers.

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4. Schifter, D. (1998). Learning Mathematics for Teaching: From a Teacher's Seminar to the Classroom. Journal of Mathematics Teacher Education, 1, pp. 55-87.

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5. Anderson, A., Anderson, J., and Shapiro, J. (2004). Mathematical Discourse in Shared Storybook Reading. Journal for Research in Mathematics Education, 35(1), pp. 5-33.

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6. Fuys, D.J., and Liebov, A.K. (1993). Geometry and Spatial Sense. In R. Jensen (ed.), Research ideas for the classroom: Early childhood mathematics. NCTM: Reston, VA.