The study focused on the effect of teams-games-tournament (TGT) on mathematics performance, behavioral engagement, cognitive engagement, and motivation to learn mathematics of Grade 8 students. Experimental and descriptive methods of research were utilized. Findings revealed that there was no significant difference in the pre-test results of the experimental and control group with the t-test p-value of 0.975086. After the intervention, data showed significant difference in the post-test results of the experimental and control group with the t-test p-value of 0.04609. It means that after the implementation of teams-games-tournament strategy, experimental group excelled. TGT strategy effectively enriched the performance of the students in mathematics. Furthermore, experimental group was more behaviourally and cognitively engaged and motivated to learn mathematics than the control group.