Students' mathematical intuition about estimation can serve as an entry point for tasks exploring measures of center.

Contributor Notes

George J. Roy,, teaches middle school methods courses at the University of South Carolina in Columbia. He is interested in examining uses of technology in middle school mathematics classrooms and preservice teachers' development of mathematical content knowledge.

Thomas E. Hodges,, is a teacher education faculty member at the University of South Carolina. He works with preservice and in-service teachers and enjoys helping students see and act on the world as mathematicians.

LuAnn Graul,, teaches seventh-grade mathematics at Dutch Fork Middle School in Irmo, South Carolina. In addition to having taught middle school for twenty-three years, she has served as Seventh Grade Department Head for four years. Her interests include fostering confident math students and algebraic developmental thinking.

(Corresponding author is Roy author is Hodges author is Graul
Mathematics Teaching in the Middle School


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