Based on the result of unpaired t-test, the study found out that significance for the knowledge was 0.80, for the attitude was 0.03, for the practice was 0.46, while the total reached 0.36.
The mixed-method study depended on quantitative and qualitative data sourced from the questionnaire comprising three domains of knowledge, attitude, and the practice of Islamic moderation and in-depth interview with the students, alumni, teachers, and the leaders of Islamic Boarding School. Islamic moderation became an important topic in developing the understanding of diversity in Indonesia. This research aimed at identifying the Moslems character called Ahlus-Sunnah wal-Jamaah an-Nahdliyah (Aswaja) to strengthen the Islamic moderation in Islamic Boarding School. There are still gaps for other researchers to conduct development research outside of that scope. That is the focus on strengthening religious moderateism in Islamic educational institutions which are under the shelter of the LP. The limitation of this study has specific scope. The implementation as culture of madrasa, such as the obligation to pray before starting the lesson, orderly running pickets, praying dzuhur in congregation, wearing school uniforms, preserving ancestral culture, familiarizing greetings, sympathetic care routinely for yatama and dhuafa, maintaining the cleanliness of the madrasa environment, and a ban on littering the classroom walls.
Miftahul Huda Bulungan Pakis Aji Jepara was developed through teaching the value of tawassuth, tawazun, tasamuh and i'tidal. Apparently, Aswaja An-Nahdliyyah's character education at MTs. Through the frame of character education theory, the data analyzed using the stages of reduction, presentation, and drawing conclusions. Through a descriptive-qualitative approach, data collection is done by interview, observation, and documentation. Because, students are faced with conditions of changing the order of values and traditions that are very fast and unexpected. The role of Islamic education institutions in applying moderate Islamic understanding in this disruption era is necessary. The researcher describes the behavior of Aswaja An-Nahdliyyah character education practiced by Islamic educational institutions as a basis for strengthening religious moderatism. This study aims to elaborate the strengthening of Islamic moderateism through Aswaja An-Nahdliyyah character education.