Current landscapes of curriculum discourse and educational practice are examined by focusing on co-evolutions of metaphors for knowledge, learning and teaching across four prominent 'frames'--namely, Standardized Education, Authentic Education, Democratic Citizenship Education and Systemic Sustainability Education. It is argued that these frames…

Teachers are encouraged to examine more critically the assumptions on which science curricula are based so they will be less likely to accept naive approaches to discovery learning. Examples from the Physical Science Study Committee (PSSC) and Nuffield Physics are used to show how they use discovery learning. (IS)