From school-based projects and debates to cross-country collaborations via EEPEK’s Moodle platform and eTwinning, the Hubs transformed classrooms and schools into dynamic learning environments for environmental awareness and sustainability action. Teachers creatively adapted EU-GREW materials, producing new lesson plans, student campaigns, and digital outputs that bridged science, citizenship, and art. Continuous mentoring by the EEPEK coordination team ensured quality, consistency, and motivation across Europe.