This project involves three countries from north (Denmark), central (Germany) and south (Spain) of Europe. The project partners met before in eTwinning projects and KA1 mobilities so that they had an idea about each others school culture. All three schools have in common that they focus on STEM and sustainability in their school development but want to expand their knowledge and experience on a more international level. The main objectives of this project are not just involving students in a European project setting and thus learning a lot about different cultures but also to focus on our school profile in terms of STEM and sustainability concentrating on what is happening on a local level and taking these results to discuss them on a global meta-basis. Apart from cultural, scientific and environmental objectives, underprivileged students should also get the opportunity to show their strengths, motivation and interest in scientific projects independently of their backgrounds.