Education is a goal-oriented field. But if we want to treat education scientifically so we can accumulate, evaluate, and refine what we learn, then we must develop a theoretical framework that is strongly rooted in objective observations and through which different theoretical models of student thinking can be compared. Much that is known in the…

This paper charts a cognitive history of the concepts of quantity and quality from three inter-related and inter-dependent perspectives of mathematics, logic, and physics. In so doing, other notions associated with the evolution of these concepts are identified and explicated. It is argued that the concepts of quantity and quality, considered in…

The aim of the research reported in this dissertation is to describe how experienced secondary school teachers learn at work in an informal environment. The study is part of a larger research project aimed at providing a conceptual framework of teacher learning in the workplace as it takes place both in informal and formal learning environments.…

In recent years educators and educational researchers in the U.S. have begun to introduce engineering design activities in secondary science classrooms for the purpose of scaffolding science learning as well as supporting such general problem-solving skills as decision making and working in teams. However, such curricula risk perpetuating a…

This study was designed to explore the ways in which preservice teachers' reflective judgment levels influenced their perceptions of and decisions about complex and ill-defined dilemmas they encountered in their field placement classrooms. Participants were ten traditional-aged juniors in a college teacher preparation program who were completing a…