In this paper I describe classroom experiences with pre-service secondary mathematics teachers (PSMTs) investigating and extending patterns embedded in the Pythagorean configuration. This geometric figure is a fruitful source of mathematical tasks to help students, including PSMTs, further develop habits of mind such as visualization,…

Many benefits have been claimed for visualizations, a general assumption being that learning is facilitated. However, several researchers argue that little is known about the cognitive value of graphical representations, be they schematic visualizations, such as diagrams or more realistic, such as virtual reality. The study reported in the paper…

Chemists and scientists use spatial abilities as part of the way they understand and communicate their subject areas. A review of the foundational research literature in spatial ability and its connections to chemistry as a field and chemical education research allows for the formulation of implications for teaching in chemistry. (Contains 7…

For the thirty-third year, the Research and Theory Division of the Association for Educational Communications and Technology (AECT) is sponsoring the publication of these Proceedings. This is Volume #2 of the 33rd "Annual Proceedings of Selected Papers on the Practice of Educational Communications and Technology." This volume includes…