6-days training of trainers for the project CL@SS was carried out in the period 4 to 9 April 2016 in Ostrava, the Czech Republic. The training was organized and conducted by qualified trainers of the Czech partner RPIC-ViP. It was attended by 12 selected trainees coming from Turkey, Slovenia, Romania and Bulgaria whose mission was to get acquainted with the methodology and to learn how to carry out trainings of teachers in their own countries as planned in the project. The train-the-trainers programme integrated theoretical and practical parts and its design followed the model of the transferred project methodology for teaching social skills. After passing through the full cycle of activities and discussing their purpose and logical sequence, the trainees were given the opportunity to practice in real their knowledge and skills and receive feedback on their performance. All participants were active and engaged in the process of discussion and interaction, contributing by sharing experience and creative ideas for the good working atmosphere and positive results achieved. Leisure time was also fully used to expand the common cultural knowledge and strengthening of good partnership and transnational relationships while visiting interesting places and sights in the city and the region. Full of energy and inspiration the newly trained trainers headed to their countries, where in June 2016 they will carry out training sessions with teachers from secondary schools to work with the methodology of teaching social skills.