PENGEMBANGAN GAME-BASED LEARNING BERBANTUAN YOUTUBE UNTUK MENINGKATKAN KETERLIBATAN DAN KETERAMPILAN MATEMATIKA SISWA SD

Mathematics learning in elementary schools still faces challenges in the form of low student engagement and limited mathematical skills due to the dominance of conventional teacher-centered instructional methods. This condition results in students’ difficulties in understanding abstract concepts, particularly quadrilateral plane figures. This study aimed to develop and evaluate a YouTube-assisted Game-Based Learning model that is valid, practical, and effective in improving student engagement and mathematical skills at the elementary school level. The study employed a Research and Development approach using the ADDIE model, which consists of analysis, design, development, implementation, and evaluation stages. The research subjects were 18 third-grade students at MI Muhammadiyah 03 Wedung, Lamongan Regency. The developed learning model integrates YouTube instructional videos as conceptual priming to support initial conceptual understanding and non-digital educational games using tangram as tools for exploration and concept application. Model validity was examined through expert validation, while practicality and effectiveness were measured using a one-group pretest–posttest design, student engagement observations, and student response questionnaires. The results showed that the learning model achieved a validity score of 84%, categorized as highly valid. Effectiveness testing indicated an improvement in students’ mathematical skills with an N-gain score of 0.53, classified as moderate. Furthermore, student engagement reached 86%, categorized as very high across cognitive, affective, and behavioral aspects. Therefore, the YouTube-assisted Game-Based Learning model is feasible as an innovative alternative for elementary mathematics instruction.