Eco-Schools is an international program of the “Foundation for Environmental Education”, developed in Portugal since 1996 by the ABAE. It aims to encourage actions and recognize the quality work developed by the school, in the ambit of Environmental Education for Sustainability. The program is coordinated at the international, national, regional and school levels. This multilevel coordination allows a confluence for common objectives, methodologies and uses that respect the specificity of each school and its media.