Activities at Islamic boarding schools are rich in NCTM content and process standards, as they connect religious, cultural, and social elements of society. The purpose of this study is to explore ideas for activities at Islamic boarding schools using NCTM content and process standards. The study uses qualitative research with the researcher as a participant. Data collection techniques include observation, interviews, and literature review. Data analysis involved data reduction, data presentation, and conclusions. The research findings concluded that various boarding school activities, such as inheritance calculations, determining the start of the Hijri month, selamatan traditions, zakat fitrah and zakat mal, buying and selling, arranging sandals, and mosque construction, incorporate mathematical concepts related to numbers, algebra, geometry, measurement, data analysis, and probability. From a process standards perspective, these activities reflect problem-solving, connections, communication, representation, and mathematical reasoning and proof. The integration of pesantren culture with mathematics education has the potential to enrich the learning context, enhance higher-order thinking skills, and make the material more relevant to students, particularly in regions with similar cultural backgrounds.
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