The Libergier high school in Reims is a city center high school welcoming a public of pupils and students from second to BTS. In addition to its participation in the Erasmus+ program as part of KA1 projects, the establishment holds the ECHE charter to develop and support the mobility of BTS students and staff. The BTS international business is the only training that requires students to complete an internship abroad of at least 2 months. It serves as a driving force for other higher technician sections to encourage as many students as possible to complete an internship abroad. Staff working in STS are also required to carry out observation mobilities to strengthen partnership relationships with intermediary organizations such as European schools or directly with host companies. This project therefore had the ambition to extend beyond the BTS Commerce International. However, following the health crisis, partnerships have been difficult to remobilize and opportunities for teacher mobility have been rare. The envelope for this project was initially planned for a wide audience of students and staff from other BTS, particularly scientists.