This study was conducted to determine the effectiveness of using gamification in improving learners’ performance on the topic of rational numbers. A quasi-experimental design was employed. The participants were 60 Grade 7 students from Odiongan National High School in Dapawan, Odiongan, Romblon, officially enrolled for the school year 2024–2025. The students were equally divided into two groups. One group, the experimental group, was taught using a gamified method called Spin and Solve, while the control group was taught using conventional teaching methods. A researcher-made, 30-item MELC-based multiple-choice diagnostic test on rational numbers was administered as both a pre-test and a post-test. Pre-test results revealed that both the control and experimental groups demonstrated a "Developing Understanding" of rational numbers, indicating comparable baseline performance. After the intervention, post-test results showed that the experimental group improved to the "Proficient" level, while the control group remained within the "Developing Understanding" category. Statistical analysis confirmed a significant difference in post-test scores, with the gamified group demonstrating substantially greater improvement. Although both instructional methods led to learning gains, the gamified approach proved more effective in enhancing students’ conceptual understanding of rational numbers. It is recommended that gamified tools such as Spin and Solve be incorporated into the teaching of rational numbers to better support and sustain student performance.