Project „Let‘s learn together“ had 80 participants in total, 60 students and 20 teachers. This project let the students learn more about meaningful freetime spending possibilities: each partner school created presentations of the host country, conducted surveys of “Teenagers’ free time” in their schools. A project website was created and all schools now have stands of the project. The Project logo was chosen and questionnaires on leisure time of teenagers were compared between partners. Promotional short videos “Inspire. Encourage. Support. (IES)” about meaningful leisure time were created and a Project vocabulary was set. Particular attention was paid to the international class exchange of pupil classes by carefully developing a program of learning activities in each partner institution. During mobilities, students took part in lessons of English, mother tongue, art, physical education, met with representatives of various youth organizations, participated in cooperative activities based on creative workshops. During the mobility, participants completed the “Mobility Diary”. After returning from mobility, pupils compiled articles and photo albums based on “Mobility Diaries” and the experience was presented to the school community. We used “Mobility Diaries”, questionnaires, discussions to discuss the impact of the project. Students were pleased to know that English language skills and knowledge have improved. They also got acquainted with people who helped find a way towards self-knowledge and development. Students learned how to use the new ICT tools; acquired theoretical knowledge about the culture, history, mother-tongue and traditions of the partner countries; acquired specific knowledge in international mobility, taking into account the goals and objectives of the lessons; improved creativity, cooperation, and cognitive competencies; became more courageous, more self-confident. Teachers got a lot of ideas for creating educational spaces, organizing non-traditional lessons or cognitive activities, new teaching methods, ICT tools and programs, effective forms of cooperation with parents; also improved their skills of using a foreign language. Teachers shared the international good practices in teaching, learning process planning and cooperation with colleagues in schools. This project was also useful for participating institutions as representatives of the administration became involved in the project.