The Effectiveness of Gamification Technique to Students English Vocabulary Acquisition For Seventh Grade Junior High School Students at SMPN 31 Medan The Academic Year 2024/2025

This research examines how gamification influences the development of English vocabulary among seventh-grade students at SMPN 31 Medan during the 2024/2025 school year. The study utilized a quasi-experimental quantitative design, dividing participants into two groups: the experimental class (VII-3) with 26 students, and the control class (VII-4) with 29 students. The experimental group engaged in vocabulary learning through gamified activities using the Kahoot platform, while the control group followed conventional teaching methods without the integration of gamification. Both groups were assessed through pre-tests and post-tests to determine vocabulary improvement before and after the intervention. Analysis of the data revealed that the experimental group experienced a significantly higher improvement, shown by a mean gain score of 68.22 and a variance of 60.64. Meanwhile, the control group recorded a mean gain score of 49.97 and a much higher variance of 431.31. The results of an independent samples t-test showed a t-value of 4.41, which is greater than the critical t-value of 2.00 at a 0.05 significance level—indicating that the difference between the two groups is statistically meaningful.