This research is prompted by concerns over the fact that religious extremism targets students. Such ideologies often penetrate through extracurricular activities of Islamic spiritual groups (Rohani Islam, Rohis). The aim of this study is to explain the process of internalizing the values of Wasathiyyah Islam through Rohis extracurricular activities, with a focus on SMAN 24 Bandung and SMAN 16 Kota Bandung. Internalizing the values of Wasathiyyah Islam refers to the process of incorporating knowledge and skills regarding moderate Islamic understanding through mentoring and guidance, thus shaping attitudes, feelings, and beliefs that become part of one's personality and form the basis of perspectives, thoughts, and actions. The indicators of Wasathiyyah Islam character in this research include commitment to the nation, tolerance, anti-violence, and accommodation of local culture. This study adopts a qualitative approach with an analytical descriptive method. Data collection is conducted through observation, interviews, and documentary studies. The findings reveal that the program of internalizing the values of Wasathiyyah Islam through Rohis extracurricular activities in SMAN 24 Bandung includes Islamic studies, spirituality, and mentoring, while in SMAN 16 Kota Bandung it includes Islamic studies, discussions, and mentoring. Supportive factors in both schools consist of the support from the school principal and teachers, the initiatives and enthusiasm of the Rohis mentors, financial support, availability of facilities, and collaboration with NGOs and alumni. On the other hand, inhibiting factors include misconceptions about religious moderation, the influence of less moderate alumni, and media content that lacks moderation.