The eTwinning project "ClubHarmony: Diverse School Clubs, One Shared Journey" brings together multinational teams of students and teachers to explore the role of school clubs in education. Students, always in multinational small sub teams, will first research scientific articles on the integration of school clubs into curricula and attend an expert-led workshop on creating effective questionnaires. Using this knowledge, they will design and distribute digital surveys to gather students' and teachers' perspectives on school clubs, their interests, and preferences. The results will then be analyzed, compared across the participating schools, and disseminated through workshops and public channels. Ultimately, the project fosters collaboration, promotes inclusion, and highlights the educational value of extracurricular activities.