In the course of the last decade the European debate on the concept of citizenship has shown that a definition of this concept in strictly legal and jurisprudence terms is reductive. Indeed a behavioral element is present, which goes beyond the defence and request for defence of rights and duties, but actually stresses the importance of acting within a community (or within several communities). A citizenship belonging to a given space/time context which, to be authentic, requires know-how and know-how-to-be that can be gained in different training opportunities (formal, informal etc.) with various active learning methodologies and through experience. The SEDEC project aims to investigate which teaching methodologies and activities specifically developed for the teaching of sciences can be applied in other learning contexts, in order to sustain actions for developing an active citizenship.