Elliott, S.N., Kratochwill, T.R., Littlefield Cook, J. & Travers, J. (2000). Educational psychology: Effective teaching, effective learning (3rd ed.). Boston, MA: McGraw-Hill College.

Fox, R. (2001). Constructivism examined. Oxford review of education, 27(1), 23-35.

Hein, George E. (1991). Constructivist Learning Theory. Retrieved from

Levy, Rachel. (2015). 5 Reasons to Teach Mathematical Modeling. Retrieved from

Wickstrom, Megan H. and Aytest, Tracy. (2018). Elementary Modeling: Connecting Counting With. Retrieved from

Clements, Douglas H. and Battista, Michael, T. (1990). Constructivist Learning and Teaching. Retrieved from