Religious-based schools carry out movements by utilizing social media as a new public sphere to disseminate their Islamic identity. This study examines the contestation between three religious-based schools in Indonesia based on digital content on the school web and social media activity. The study analyzes social media accounts of Sekolah Dasar Nahdlatul Ulama (SDNU) Yogyakarta, Sekolah Dasar (SD) Muhammadiyah Yogyakarta, and Sekolah Dasar Islam Terpadu (SDIT) Taruna Al-Quran Yogyakarta. Content analysis is used for the study to find a contestation in represented of Islam. The three Islamic educational institutions compete to reveal the meaning of Islam according to each Islamic school's ideological affiliation manifested in the educational concepts, content, activity, and identity. The implication of this contestation is good competition to raise ideological education on one side and group Islam based on ideological affiliation on the other. There is a need for empirical research on the impact of madrasas on the grouping and forming of the student ideology.