This article aims to reveal the historical roots and patterns of the fundamentalism movement among students in the City of Kediri. This article is based on the field a qualitative case study. Fundamentalism is a movement that is very close to radicalism. However, the spread of fundamentalism was also found in educational institutions. This article concludes that after going through a series of in-depth studies, this article concludes that historically it cannot be found when this fundamentalism movement began to spread in State Senior High School 1 (SMAN) and State Senior High School 2 (SMAN) Kediri. What is found is that there are Islamic study activities that have allegedly been around since the school began operating. Both in SMAN 1 and SMAN 2 Kediri, no definitive clue was given as to when the spread of the religious fundamentalism movement began. The fundamentalist movement patterns in SMAN 1 and SMAN 2 Kediri City have similarities, namely through Islamic study activities. In SMAN 1, Kediri City, there are SKI activities. Meanwhile, at SMAN 2 Kediri, there were a number of activities, such as PETUAH (Saturday Sunday Pesantren) BAO, Mabīt (the night of devotion), and Aqidah. There is also the At-Tholab association (a collection of several schools). Some of these activities are a forum for the spread of Islamic religious fundamentalism, which is claimed to teach Islamic teaching in accordance with the Quran and Hads