This paper demonstrates a method for constructing long variables using items that elicit partically correct responses across ages. Long variables may be defined by students at different ages (year levels) attempting common items within a test containing other items considered to be appropriate for each age or year level. A developmental model of…

This paper supports the position that Piaget's theory (including both structural and functional components), methods, and empirical data have a central role to play in the development of an effective, comprehensive pedagogy. A structural-developmental theory coordinates the teacher's knowledge of curriculum with knowledge of cognitive demands…

Three purposes of this study were to: (1) propose some organizing theoretical and observational definitions of the anchor construct; (2) present some initial findings from a diagnostic test designed to uncover anchors for high school physics instruction; and (3) provoke an initial discussion of the new methodological issues that arise in this…

Reports results of a study investigating effects of social interaction on utilization of categorical concepts by upper and lower class children. Describes an experimental guessing game with individual subjects and pairs of subjects. Concludes that the experimental setup was beneficial for all subjects regardless of social background or kind of…

The effectiveness of traditional models of remedial education of students has been called into question. Current research supports models that would merge remedial and regular education and provide all students with broad curriculum access and the opportunity to receive instruction that is adaptive to their needs. Guidelines for addressing…