This is a theoretical article to open the discussion of what an education for sustainable development is supposed to achieve and how teachers can help students to develop skills that might be needed in order to support a sustainable future. The focus in the article will be on education. As it is an article aiming to open this kind of discussion for further research, it summarizes a part of the research in the research area. This article presents the view that even as international organizations, states and governments advocate a change of the educational system to educate for sustainable development, researchers suspect that the change remains at a rhetorical level. If one wants to change the society and education, one of the cornerstones to start with is the education and training of already qualified teachers and teacher educators. This requires a change both in education and in teacher education.