Recent work in science education has emphasized the importance of the conceptual, social, and epistemic dimensions in science learning. But what about the material dimension--the actual physical materials that students use? The way their characteristics and affordances limit or determine instruction has thus far not been as thoroughly explored.…

Over the past 15 years, educational technologists have been dabbling with a research technique known as quantitative content analysis (QCA). Although it is characterized as a systematic and objective procedure for describing communication, readers find insufficient evidence of either quality in published reports. In this paper, it is argued that…

Reports on data obtained in Australia on practicing teachers' thinking as they interacted with a professional development interactive multimedia courseware package. Two types of thinking are discussed: (1) cognitive mediating processes related to content; and (2) evaluative thoughts about the instructional design of the courseware, from which a…