Consumer education is part of basic education in the Programme de formation de l’école québécoise (Quebec Educational Program) for primary education. This doctoral research answers to the problem of the lack of tracks and material for its implementation in Quebec classrooms. According to the development-research methodology, its objectives are: 1) To develop an interdisciplinary consumption education approach aimed at citizen action; 2) To develop teaching materials according to this approach and according to the principles of the Philosophy for children program. The results of this research show the potential of such an approach to foster the development of complex thinking about consumption and to stimulate the reflective action of children in their local environment, as well as the interest to develop teaching materials based on a rigorous research methodology.