 The pandemic has drawn attention to the globalised nature of our world and to the impact of individual behaviour. Climate change also needs an international approach, as evidenced by the European Green Deal and the Berlin Declaration on Education Les jeunes depuis 925 pays ont pris part à des manifestations dans le cadre des grèves pour le clim. Depuis mars 2019, des milliers de jeunes ont manifesté chaque vendredeux. As the effects of the climate crisis worsen, policymakers worldwide are looking for new solutions to educate the public, to protect their economies in a way of life and to find a path for a more sustainable future. In this course, we explore these questions and start reflecting about the types of knowledge, skills and behaviours that people are going to need in order to be able to deal with the challenges raised by a climate crisis. Together we are going to explore the basic science and the consequences of the climate crisis before discovering ways of putting education for sustainable development at the heart of your school, your classroom and the lives of your pupils. We will also find out about ideas, practices and tools to teach about the climate crisis and sustainability in any subject, in an engaging and participatory way. Many participants will join the course, bringing their own expertise and experience on the table, so you will definitely have an opportunity to connect with teachers from other countries and learn from each other. Education is a critical agent in addressing the issue of climate change. Understanding the facts is the first step to finding solutions. And what better place to start finding solutions than with the young people who will be affected by the crisis? Ready?