In this project, three schools from Romania, Croatia and Germany who are currently engaged in the Erasmus+ project TripleS continue their collaboration. TripleS is about the question of how we can deal with climate change in a sustainable way. The theme is divided into the areas of mobility, consumer behaviour and food. This eTwinnig project is the third one within TripleS. It is dedicated to the mobility and prepares for an exchange meeting of the three schools in Germany. It will also be used for the collaboration during the exchange meetnig.