With this project, we want to make an active contribution to environmental protection & the fight against climate change and in favour of the European Green Deal. To this end, we are creating (digital) teaching materials on the topic of ‘sustainability’ in line with the school focuses of the three partner schools (DE: Energy, HU: Trade, RO: Consumption). We are also implementing sustainable sub-projects with the partners and creating corresponding guidelines, which we will publish as OER.