ABSTRACT

This research aims to: (1) investigate the conditions which should be met in order that WMG can be implemented effectively in improving students’ vocabulary mastery and (2) identify to what extent WMG can improve students’ vocabulary mastery and give positive classroom situation in class VII C of SMP Negeri 3 Sidoharjo in academic year 2016/2017.
This research is a Classroom Action Research (CAR). It was carried out at SMP Negeri 3 Sidoharjo in class VII C in academic year 2016/2017. It was conducted in two cycles, from April 10th 2017 until May 15th 2017. Each cycle consisted of: planning, acting, observing, and reflecting. The data of research were collected through observation, interview, questionnaire, and test.
The result of this research shows that: (1) there are some conditions which should be met in order to implement WMG effectively in improving students’ vocabulary mastery in class VII C of SMP Negeri 3 Sidoharjo: (a) the game rules and procedure should be explained clearly, (b) there should be a reward for the game winner, (c) students should be given a pre-activity game which covers aspects of vocabulary, (d) in playing this game, students work in group, so the group members should be heterogeneous, and (e) the time allocation for the game should be understood; (2) by implementing WMG under the conditions, the students’ vocabulary mastery got improved. The students’ mean score in the pre-test was 43.65, and then it improved to 57.04 in the post-test 1 and 72.35 in the post-test 2. It also gave positive classroom situation. It could be seen from the fact that: (a) students were motivated in English learning, (b) students paid full attention to teacher’s lecture and instruction, and (c) students focused on the lesson and participated actively in teaching learning process.

Keywords:    Vocabulary Mastery, What’s Missing Game (WMG)