Aristotelis S. Gkiolmas is a member of the Teaching Staff at the Department of Primary Education, National and Kapodistrian University of Athens, Greece. He obtained a Bachelor (B.Sc.) in Physics from the National and Kapodistrian University of Athens, Greece, and he worked many years as a Science teacher, in all levels of the Greek Secondary Education. His research interests include Environmental Education, critical pedagogies, teaching about social and environmental Justice and understanding complexity in societies, in education and in Nature.Constantine-(Kostas) Skordoulis is Professor of Epistemology and Didactical Methodology of Physics at the Department of Primary Education, National and Kapodistrian University of Athens, Greece. He teaches Environmental Ethics, Didactics of Science and Theory of Scientific Knowledge. He has published extensively on socio-scientific and environmental issues and has been involved in organizing the international conferences on critical education. His latest book is: “From Environmental Ethics to Political Ecology: an ecosocialist perspective”.