The central goal of this study was to characterize the mental models of acids and acid strength expressed by advanced college chemistry students when engaged in prediction, explanation, and justification tasks that asked them to rank chemical compounds based on their relative acid strength. For that purpose we completed a qualitative research…

Describes a study that investigated the role of a design context for developing children's understanding of science as the construction and revision of models. Results indicate that as early as the first grade, children's model-evaluation skills may be quite amenable to development. (DDR)

A model to illuminate and relate various twentieth-century philosophical perspectives on key questions about the nature of scientific theories and, therefore, aspects of the structure and development of postmodern science is described. The Scientific Theory Profile model then forms the basis for a course for science teachers in perspectives on the…