Through a randomized controlled trial, this mixed-methods study evaluated changes in elementary science teachers' understandings, confidence, and classroom implementation of problem-based learning (PBL), inquiry, and nature of science (NOS) instruction following participation in a professional development (PD) as well as the components of the PD…

The "Implementation Proneness Typology" was developed to facilitate examination of a teacher's implementation to new innovations in a quantitative manner. Dimensions considered include assertiveness, surgency, conscientiousness, venturesomeness, imaginativeness, shrewdness, experimentiveness, self-sufficiency, humanistic classroom…

Discusses in general terms the approaches necessary for effective dissemination and implementation of an educational program in a country and then relates these approaches to the cooperative relationship between the University of California at Berkeley and the Israel Science Teaching Center's MATAL and PELE Projects. (CS)