This article addresses the issue of the level of conceptual demand of science curricula by analysing the case of the current Portuguese Natural Sciences curriculum for middle school. Conceptual demand is seen in terms of the complexity of cognitive skills, the complexity of scientific knowledge and the intra-disciplinary relations between distinct…

The study analyses the extent to which the sociological message transmitted by the teachers' pedagogic practice recontextualizes the official pedagogic discourse of the natural sciences curriculum for a Portuguese middle school. Theoretically, the study is based on theories of psychology (e.g. Vygotsky), epistemology (e.g. Ziman) and sociology,…