References

Smith, M.S., & Stein, M.K. (1998). "Selecting and creating mathematical tasks: From research to practice." Mathematics teaching in the middle school, 3(5), 344-350. Retrieved from http://0-www.jstor.org.wncln.wncln.org/stable/41180423.

Stein, M. K., & Smith, M. S. (n.d.). Mathematical Task Framework as a Tool for Reflection: From Research to Practice. In Mathematics Teaching in Middle School: (4th ed., Vol. 3, January 1998, pp. 268-275). National Council of Teachers of Mathematics.