ABSTRACT
Charlene Beckmann (Char), a university mathematics and mathematics education professor, first met Tara, a secondary teacher, and Kara, an elementary teacher, while they were undergraduates enrolled in her mathematics and mathematics education courses. Both teachers struck Char as "perceptive and insightful" mathematics teachers. In these courses, Char provided students the opportunity to experiment with a motion detector and a calculator-based laboratory (CBL), attached to a graphing calculator. The class with which the activities were implemented and whose students' responses are described in this profile was Tara's eighth-grade class. Char, Kara, and Tara used the Transition Mathematics program from the University of Chicago as their base. Students in this class were accustomed to having prospective teachers from Char's university class in their classroom on a weekly basis. Thus, having a college professor join the class for a week seemed natural to the students.
