The programmes typically involved groups of around two dozen participants, allowing for intensive interaction and hands-on activities. Thematically, the 2025 season was dominated by local culture and everyday life, urban history, and nature-based exploration, often combined within one course. Many SUs complemented excursions and city exploration with practical workshops, such as Turkish coffee preparation and sustainability sessions in Ankara and Istanbul, outdoor and adventure-oriented formats in Brescia, food- and market-focused activities in Catania and Pescara, and creative or city-based workshops in Bakı and Praha. Overall, the 2025 SUs followed a consistent pattern of learning through experience, combining structured activities with informal exchange and shared daily life.