AbstractThe purpose of this research is to answer the research question “how effective is the use of bang-bang game to increase vocabulary achievement of the seventh grade students of SMPN 11 Pontianak?â€. The research focused on the seventh grade students of SMPN 11 Pontianak in Academic Year 2017/2018 by administering a vocabulary test of common noun before and after the treatment given. In conducting this research, the researcher applied pre-experimental research using one sample group with no control group. The data showed that the mean score of the students’ post-test was (85.60) higher than students’ pre-test (45.66).The research indicated that the effect size was categorized as moderate effect. The t-test (4.01) was bigger than the t-table (2.042). In conclusion, it is clear that the alternative hypothesis “The use of bang-bang game as the teaching technique in teaching vocabulary is effective to increase students’ vocabulary achievement was accepted, and the null hypothesis was rejectedâ€.           Keywords: Bang-bang Game, Vocabulary, Pre-Experimental StudyÂ
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