With the projects of Key Action 1 in Erasmus+, Humboldt-Universität zu Berlin aims to promote the interests and educational biographies of university members and at the same time promote the overarching internationalization of the institution. This requires the inclusion of all status groups and is also successfully implemented. Individual experience in an international context is an important element that gives participants access to new teaching and learning environments and content, as well as to international networks, and expands linguistic, technical and socio-cultural skills on many levels. For this reason, HU focuses on the implementation of mobility areas and ensures reliable structures and instruments at central and faculty level. The faculties are the central sponsors of these activities, with a direct approach to the students, and the responsibility for professional support and examination also lies here. The faculties work closely with the Central International Office for administrative matters and beyond. One goal that was also pursued in this project was the better integration of the KA131 measures with the goals and activities of the European University Alliance Circle U., in particular the establishment and expansion of flexible short-term formats in mobility was planned. Another project goal was to better coordinate the processes and goals with the other mobility areas in Erasmus+ (KA171) and outside the European Education Programme.