Sources used in the creation of "What's in a number?":
Chapin, S & O’Connor, C (2007). Academically Productive Talk: Supporting Student Learning in Mathematics, in Martin, W.G., Strutchens, M. & Elliott, P. (eds.), The Learning of Mathematics, 69th NCTM Yearbook, National Council of Teachers of Mathematics: Reston, VA, pp. 113-128.
Siemon, D., Beswick, K., Brady, K., Clark, J., Faragher, R., & Warren, E. (2011). Teaching mathematics: Foundations to middle years. University of Tasmania.