This study aimed to analyze the implementation of the GASING (Easy, Fun, and Enjoyable) method through the traditional Congka game in improving the mathematical conceptual understanding of students at MIT Daarunnaim Ambon. The study employed a mixed methods approach using a convergent parallel mixed methods design. The population, sample, and research subjects consisted of 20 fourth-grade students at MIT Daarunnaim Ambon. The research instruments included a mathematical conceptual understanding test, observation sheets, and interview guidelines. Quantitative data were analyzed using descriptive statistics and the Normalized Gain (N-Gain), while qualitative data were analyzed through data reduction, data display, and conclusion drawing. The findings revealed that the implementation of the GASING method integrated with the traditional Congka game was carried out through the concrete, abstract, and mental calculation stages, creating an active, enjoyable, and contextual learning environment. The data analysis showed an average N-Gain score of 0.77, which falls into the high category. These findings indicate that the GASING method through the traditional Congka game is effective in improving the mathematical conceptual understanding of students at MIT Daarunnaim Ambon.
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