<![CDATA[Students’ mathematical problem-solving ability and learning independence in Integrated Islamic Junior High Schools (SMP IT) still need to be improved. In addition, the implementation of ADLX Introflex-based learning has not been fully supported by interactive learning media. This study aimed to develop learning media based on ADLX Introflex assisted by GeoGebra for the topic of triangle and quadrilateral congruence and to describe its quality in terms of validity, practicality, and effectiveness. This research employed the Research and Development (R&D) method using the ADDIE model, consisting of Analyze, Design, Develop, Implement, and Evaluate stages. A small-scale trial was conducted at SMPIT Iqro Nogosari, Boyolali, while a large-scale trial was conducted at SMPIT Nur Hidayah Surakarta, involving eighth-grade students. Data were collected through interviews, observations, questionnaires, mathematical problem-solving tests, and learning independence questionnaires. Data were analyzed descriptively and quantitatively to determine the validity and practicality of the media, while its effectiveness was analyzed using a normality test and the Wilcoxon Signed Rank Test on pretest and posttest results. The results showed that the media obtained mean scores of 4.79 from material experts and 4.82 from media experts, both categorized as highly valid. Teacher and student responses indicated that the media was highly practical. Statistical analysis also showed significant improvements in students’ mathematical problem-solving ability and learning independence. Therefore, the developed media is valid, practical, and effective for mathematics learning.]]>
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