Marselina Bergita Ngene Pengarang ELISNA HUAN Dosen Pembimbing 2 Yunita R. Bani Billi Dosen Pembimbing 1 Josua Bire Penguji 2 Elisna Huan Penguji 1 Yunita R. Bani Billi Ketua Penguji

The research objective was to determine whether or not the Kahoot game is effective for teaching and learning vocabulary for class XI Bahasa students of SMAN 5 Kupang and the challenges students find in applying the Kahoot game in learning English vocabulary. The research applied quantitative procedure and used quasi-experimental as the research design. The research sample was 36 students of class XI Bahasa, divided into two groups; one as the experimental group and one as the control group. They were given two tests and a non-test: Pre-test and Post-test, and a close-ended questionnaire. The experimental group used the Kahoot game. Then they used their mobile phone to access the material on the Kahoot game, and when they finished the Post-test, they filled the questionnaire. The data was then analyzed using SPSS 16 and descriptive statistical analysis. The result of the research found that the value of t0 (2.382) > tt (2.037) and the importance of significance level of p significance (2-tailed) is (0.023) < (0.05), which means that the use of the Kahoot game is effective. The research also found some challenges in using the Kahoot game: the internet connections, the availability of tools to access the Kahoot game and Zoom Meetings, and it is hard to use the Kahoot game through Zoom meetings.