Referencias

Behr, M., Harel, G., Post, T., & Lesh, R. (1992). Rational number, ratio and proportion. En D. Grouws (Ed.), Handbook of research on mathematics teaching and learning (pp. 296–333). New York, NY: Macmillan.

NCTM [National Council of Teachers of Mathematics] (2000). Principles and standards for school mathematics. Reston, VA: Author.

Vergnaud, G. (1983). Multiplicative structures. En R. Lesh & M. Landau (Eds.), Acquisition of mathematics concepts and processes (pp.127–174). New York, NY: Academic Press.

Whitman, C. (2001). It’s all connected: The power of proportional reasoning to understand mathematics concepts, Grades 6-8. Reston, VA: NCTM.

Nunes, T., & Bryant, P. (2010). Understanding relations and their graphical representation. En T. Nunes, P. Bryant, & A. Watson (Eds.), Key understanding in mathematics learning. http://www.nuffieldfoundation.org/sites/defaukt/files/P4.pdf

Nunes, T., Schliemann, A. D., & Carraher, D. W. (1993). Mathematics in the streets and in schools. Cambridge: Cambridge University Press.

Hart, K. M. (1981). Children’s understanding of mathematics: 11–16. London: Murray.

Mix, Kelly S. , J. Huttenlocher & S. Cohen Levine (2002). Quantitative development in infancy and early childhood. Oxford: Oxford University Press.