The aim of our Erasmus+ KA2 project "Hello Teenager!" is to focus on the challenging life of today's teenagers. With the help of this project six European schools aim to improve the well-being of teenagers, to increase the participation of teenagers, to increase the awareness of environmental issues and sustainability and to develop the school culture of the participating schools into more international and sustainable. The participating schools also aim to increase international competence and skills of the pupils and school staff. This project will help the schools and participants to expand their European networks. The project participants of the project "Hello Teenager!": Oriveden yhteiskoulu, Orivesi Finland Oriveden lukio, Orivesi Finland Liceo Classico Statale Pilo Albertelli, Rome Italy Gimnazija i strukovna škola Jurja Dobrile, Pazin Croatia Agrupamento de Escolas de Alvaiázere, Alvaiázere Portugal Gymnasium Am Turmhof, Mechernich Germany