Evaluability assessment is a diagnostic and prescriptive technique that can be used to determine the extent to which different problems inhibit program evaluation. It involves policymakers, managers, and staff in developing program theory, clarifying intended uses of evaluation information, and planning further evaluations that would stimulate…

The five articles of this theme issue focus on new developments in the evaluation of science education programs that have both substantive and theoretical implications for the field of evaluation. Past and current evaluation approaches are reviewed, and an overview is given of new assessments consistent with new curriculum developments. (SLD)