This study aimed to develop an effective Problem-Based Learning (PBL)-based Mathematics Learning Module for seventh-grade junior high school (SMP/MTs) students, enhancing the mathematics learning process through a combination of guided instruction and independent study. The research employed the ADDIE development model, which consists of five stages: Analysis, Design, Development, Implementation, and Evaluation. The module content was systematically designed through a needs analysis, conceptual design, prototype development, and formative evaluation. Expert validation results indicated that the PBL-based mathematics module demonstrated good quality in terms of content relevance, instructional design, and usability. It is expected that the developed module will serve as an effective instructional resource, supporting teachers in implementing student-centered learning and promoting students’ active engagement and problem-solving skills in mathematics.
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