Abstrak
The rationality of the research is based on that the students have difficulty in remembering and understanding the meaning of English words, the teacher still use conventional strategy in the class, and many students are not able to understand the words conveyed by the teacher orally in English. This research aimed to find out the effect of KIM Memory Game toward students’ vocabulary mastery. This research emphasized quantitative approach with experimental design. The sample of this study consisted of 54 students. Pre- test were given to the students in experimental and control class before any treatment. The experimental class were treated by using Kim’s Memory Game while control class were not. After the treatment, both classes were given post-test. The test consisted of 15 multiple choice items. The research found that there was a significant effect of using Kim’s memory game towards students’ vocabulary mastery which was proved by the sig value is smaller than alpha (0.000 0.05). Then, it was also found there is differences of students’ vocabulary mastery of those who were taught by using Kim’s memory game and those that were not taught. This was also proved by the sig.value smaller than alpha (0.000 0.05). As the conclusion, the Kim’s Memory Game affected the students’ vocabulary mastery and it was proved to be better than the students who were not using it.