An educational assessment embodies an argument from a handful of observations of what students say, do or make in a handful of particular circumstances, to what they know or can do in what kinds of situations more broadly. This article discusses ways in which research into the nature and development of expertise can help assessment designers…

Explores whether exposure to increasingly sophisticated mental models at different points in a chemistry education class showed up in patterns of preference and use of models in interpreting physical properties and phenomena. (Contains 92 references.) (DDR)

Schools are professional work groups requiring the application of professional knowledge to constantly shifting educational challenges as adults work to help students learn. This paper describes a theory of professional visualization through which principals can make their professional practice consistent with their knowledge, values, and…