Abstract
As part of a project on the interdisciplinary representation of priority issues associated with the sustainable development of the Seine, 20 collective interviews were carried out with 59 students from three secondary schools in France. The analysis of the interviews determines three themes which relate to the individual and collective experience of the project, the relationship to ecological knowledge and the vision of nature and the territorial anchoring and protection of the river. Students emphasize the value of approaches that go beyond the traditional school form and that are linked with their local reality, both geographic and lived. The use of the theory of relation to knowledge leads to discussing the epistemic, social and identity dimensions involved in this work.