Abstract :
This study was an action research study. It was done in two cycles, from 23th of July to 23th of August 2019. Each cycle consisted of three meetings. The steps of the research were reconnaissance, planning, action and observation and reflection. The subjects of this research were 40 students of X MIPA class. The data were in the form of qualitative and quantitative data. The qualitative data were collected through observing the teaching learning process, and taking photographs of the teaching learning process. The quantitative data were collected from questionnaires and the students? vocabulary score of pre-test and post-test to see the improvement of the students? vocabulary mastery. The instruments for collecting data were observations checklist, questionnaire, and a camera.
The research findings showed that vocabulary mastery of most students improved after Scrabble Game was used in the teaching and learning process. It was indicated by the increase of the mean of students? vocabulary score in the pre-test and post-test (61,6 to 81,4). The students? involvement and classroom interaction during the implementation of the game were improved. It was showed by students? enthusiasm during the game. They tried to be the first winner and raised their competitiveness among them. In addition, the implementation of Scrabble Game and the complementary actions were successful to help the students memorize and understand new words easily. In conclusion, the students? vocabulary mastery was improved through the implementation of Scrabble Game.