In this paper, we report on our efforts to support teachers' development of mathematical knowledge for teaching through online professional development focusing on authentic engagement in collaborative mathematical problem solving. In particular, this paper seeks to explore and understand the relationship between online mathematical collaboration…

Examines human-computer interaction from two views of cognition: the representationist view and the enactivist perspective. A chaos-theory context is discussed from an enactivist stance. In this context, high school students manipulate nonlinear dynamic computer programs. Implications of the enactive stance for education and research are also…

Introducing students and teachers to the social structure of scientific communication as part of a hands-on, minds-on approach can increase students' knowledge and interest in the sciences. Describes SAM-Net which incorporates scientific communication, electronic networking, and scientific research as practiced by scientists into a K-12 science…