Education for consumption is now directly challenged by two of the Sustainable Development Goals: Quality Education and Responsible Consumption and Production. This thesis carries out a contextualized approach to the concept of "Quantum Satis" and proposes educational improvement actions for the transformation of production and consumption models. Placing education for sustainable consumption at the nexus between education for peace and education for sustainable development, we propose Quantum Satis as a framework for the self-regulation of consumption. It is a complex and dynamic concept that goes beyond the quantitative aspects -how much to consume-, to delve into the qualitative dimension of consumption -what do I need-. This concept integrates the objective arena -how do I fulfil my needs-with the subjective realm of life -how do I perceive the satisfaction of my needs-as well as with the inter and transsubjective: how do I live my needs in relation to my reference group and to the interdependent social and ecological subsystems in which I develop my life. These dimensions are interwoven around three interconnected thematic axes: transpersonal well-being, fair measurement, and critical autonomy. The methodological design used in our study is that of participatory action-research because it allows to integrate practical interest and emancipatory interest, theoretical and experiential knowledge, deepen the meanings and identify patterns that unite them from different perspectives. From a systemic standpoint, we explain how Quantum Satis develops in a school in the Principality of Andorra, what aspects facilitate its implementation and what are the major obstacles. The findings show that the participating community is immersed in a dialectical transition between the traditional educational model, of a transmissive nature, which guides learning by external demand, and the ecological model focused on social transformation through participatory negotiation of meanings. Based on the lessons of the process, we propose to orient educational practice towards the value of interdependent autonomy and inclusive participation as well as to incorporate the methodology of conflict transformation into education for sustainable consumption.