The purpose of the study is to determine the effect of Raise Your Flag intervention to enhance students’ engagement in mathematics. Hence, the purpose of this study was to determine the significant difference between the pretest and post-test scores of the students. Pre-experimental research design was utilized in this study to measure the effect of the intervention. The data were gathered in 35 students from Grade 9 in Asuncion National High School who were selected through purposive sampling. Data gathering was done through Pretest and Post-test Administration. Findings revealed a substantial difference in the scores before with the mean percentage score of 4.05 (High) and after the intervention in enhancing students’ engagement in mathematics with the mean percentage score of 4.43 (Very High). Results also revealed that there is a significant improvement in the students’ scores from the pretest to the post-test, with the post-test mean percentage scores that has descriptive level of very high which interpreted as very satisfactory. This substantial difference suggests a strong effect of the treatment to enhance students’ engagement in mathematics, it indicates a highly significant and positive impact of the intervention or treatment on the students’ performance engagement in mathematics.