More than two decades of research and experience supports the idea that computer and calculator technologies can have an important role to play in supporting and effecting student learning (Heid, 1988; Kaput, 1992; Kutzler, 1996; Papert, 1980; Waits and Demana, 1999). The development of Classroom Communication Systems (CCSs) is providing new possibilities for technologies to play a fundamental role in creating and supporting effective learning environments. The TI-Navigator from Texas Instruments (TI) is a wireless CCS and its advent brings the power and potential of CCSs into K-12 classrooms in a novel, flexible, and mobile way. The pedagogical potential of CCS technology is still in its development stage but preliminary research suggests considerable benefits to active student participation in class and collaborative inquiry in the classroom (Abrahamson, Davidian, & Lippai, 2000; Bransford, Brophy, & Williams, 2000; Davis, 2002; Dufresne, Gerace, Leonard, Mestre, & Wenk, 1996; Mestre, Gerace, Dufresne, & Leonard, 1997; Wenk, Dufresne, Gerace, Leonard, & Mestre, 1997). The present study is designed to illustrate the potential of CCSs in facilitating effective teaching and creating effective learning environments. (Author)