This study aims to determine the effect of the Relating, Experiencing, Applying, Cooperating, and Transferring (REACT) learning model on improving mathematical problem-solving abilities in terms of learning motivation. The population in this study were 287 students of grade XI even semester at MA Negeri 1 Kota Serang in the 2024/2025 academic year and the sample consisted of 26 students of grade XI IPA 1 and 26 students of grade XI IPA 3. The research method used was a quasi-experimental design with a non-equivalent control group design. The sampling technique in this study used a purposive sampling technique. The research instruments included a mathematical problem-solving ability test and a learning motivation questionnaire. Data were analyzed using a two-way ANOVA test. The results of the study can be concluded that: 1) there is an influence of the REACT learning model on improving mathematical problem-solving abilities, 2) there is an influence of learning motivation (high, medium, low) on improving mathematical problem-solving abilities after implementing the learning model, and 3) there is an interaction between the REACT learning model and learning motivation on improving mathematical problem-solving abilities.
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