This study aims to examine the role of Islamic Religious Education teachers in instilling wasathiyah Islamic values at MTs Almaarif 03 Singosari. Wasathiyah Islamic values include a middle attitude, fairness, tolerance, balance, amar ma'ruf nahi munkar. Wasathiyah Islamic values are the basis for building inclusive and harmonious religious awareness in the school environment. The research method used is a qualitative approach. Researchers used primary data sources and secondary data sources, with data collection techniques through interviews, observation, and documentation. The data that has been collected is then analyzed using a descriptive approach.The results of the study show that the role of the Islamic Religious Education teacher is very important in instilling wasathiyah Islamic values to students at MTs Almaarif 03 Singosari. Islamic Religious Education teachers act as educators, models and role models, facilitators, motivators, evaluators, teachers, mentors, and trainers. Islamic Religious Education teachers have a deep understanding of wasathiyah Islamic values and are able to transfer this understanding to students through various learning methods, habituation activities, and extracurricular activities.

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