Bradley, Elizabeth H. "Finding Common Ground." Mathematics Teaching in the Middle School 5 (December 1999): 236. Spence, L. "How Many Elements Are in a Union of Sets?" Mathematics Teacher 80 (November 1987): 666-670, 681. Van de Walle, J., and C. Thompson. "Promoting Mathematical Thinking" Arithmetic Teacher 32 (February 1985): 7-13. Welchman-Tischler, R. "Making Mathematical Connections." Arithmetic Teacher 39 (May 1992): 12-18. |