<![CDATA[Critical thinking is a crucial 21st-century skill that assists students in analyzing, evaluating, and solving problems systematically. However, PISA 2022 results and various findings indicate that students' critical thinking skills remain low, necessitating more interactive learning innovations. This study aims to integrate UNO card game elements into the interactive learning media “UNO MATH” for algebra material and to evaluate its validity, practicality, and effectiveness in supporting critical thinking. Gamification integration was achieved by designing five types of interactive cards (Identification, WHY, Multiple Choice, EXPLAIN, and CHECK) systematically mapped to Facione’s six critical thinking indicators (interpretation, analysis, evaluation, inference, explanation, and self-regulation). This research employed a Research and Development (R&D) method with the ADDIE model involving 32 seventh-grade students at SMP Negeri 1 Pagelaran, Malang Regency. The results showed that the UNO MATH media obtained an average validity score of 4.15 (Valid), a practicality score of 4.53 (Very Practical), and an effectiveness rate where 84.4% of students achieved the critical or very critical category in critical thinking skills. Thus, the 'UNO MATH' media is declared valid, very practical, and effective.]]>
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