The inculcation of religious values in schools is highly urgent in shaping character and developing students' spiritual intelligence. This study aims to examine the requirements that must be met in instilling religious values in schools and their implications for the development of students' spiritual intelligence at SMAN 1 Srengat Blitar. This study uses a qualitative case study approach with data collection techniques through observation, interviews, and documentation. The results show that the requirements for instilling religious values applied at SMAN 1 Srengat are in accordance with the goals of national education and school objectives, active participation from all school members, an environment and facilities that support the instillation of religious values in schools, religious activities that are carried out routinely every day, and certain penalties for students who do not implement religious values at school. Fulfilling these requirements has been proven to strengthen students' spiritual intelligence, which is reflected in increased awareness of worship, attitudes of tolerance, honesty, and social responsibility. Thus, instilling religious values in schools is not only a moral necessity, but also an important basis for building students' spiritual intelligence as a whole.
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