Islamic Religious Education (PAI) learning materials should be developed based on clear principles to ensure their alignment with curriculum objectives and students’ learning needs. However, previous studies have mainly discussed the principles of relevance, consistency, and adequacy descriptively without providing operational indicators for evaluating learning materials. This study aimed to examine these principles and formulate operational indicators for assessing PAI learning materials. A qualitative library research approach was employed by analyzing 20 scholarly sources, including books, accredited journal articles, and official curriculum policy documents published between 2016 and 2026. Data were collected through document analysis and examined using thematic synthesis and content analysis. The findings distinguish the operational functions of the three principles and formulate 16 operational indicators for evaluating PAI learning materials. These findings provide practical guidance for teachers and curriculum developers in designing and evaluating learning materials that are relevant, consistent, and adequate.
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