Abstract. Schools are currently very vulnerable to being infiltrated by radical ideologies and movements. This is because there has not been a single specific policy to protect or protect schools from penetration and radicalism movements. In order to realize the protection of students in schools against radicalism, the education of national values for school students is needed as a form of concern from all parties, be it the government, society, families, especially schools. National value education for students will be formed if all parties have an awareness of the importance of national value education starting from an early age. The teacher is in the most strategic position to shape the character of students. National value education in school students is the basis for initial formation because straightening a branch is much easier than straightening a tree. Therefore the most effective national value education is education for school students. The development of cultural values and the national character of school students must be carried out appropriately. If this cannot be achieved, the moral message that parents and educators will convey to students will be hampered. The development of moral values for school students can be done in the three existing education centers—namely, family, school, and community. In developing moral values for school students, it is necessary to be very careful. This is because school students are children who are in the stage of concrete preoperational development
Keywords: National value, high school, radicalism, students, student council
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