Abstract:
This is an experimental research with quantitative approach. The aims of this research is to find out whether or not teaching vocabulary using word search game is effective to improve the students‟ vocabulary mastery, especially at the tenth grade students of SMK Negeri 1 Kebumen in the academic year of 2016/2017.
The subject of the study was the students of SMK Negeri 1 Kebumen. The population of this research is the tenth grade students of SMK Negeri 1 Kebumen in the academic year of 2016/2017. As sample, the researcher took two classes consisting of 32 students of control group and 32 students of the experimental group.
The result of this research shows that word search game is effective to improve students‟ vocabulary mastery at the tenth grade students of SMK Negeri 1 Kebumen in the academic year of 2016/2017. It could be seen from the results of t-value was 10.156. Based on the 0.05 significance level, the value of t-table was 2.000 with the degree of freedom is 64, the computation showed that t-value was higher than t-table (10.156>2.000). In addition, word search game was effective to improve students‟ vocabulary mastery. It could be proved from gained score from the experimmental group is higher than control group. The mean score of experimental group was 64 and the mean score of control group was 52.5. It means that the means score of experimental group was higher than the means score of control group.
