The research was conducted to measure the effectiveness of teaching
vocabulary by using fly swatter game. This study was conducted by using quasi
experimental method. The population of the research was all of the second grade
students of SMPN 2 Baturraden in academic year 2013-2014. Random sampling
was used to take the sample of the research. The sample was divided into two
groups; 8B as the experimental class and 8A as the control class. The
experimental class was taught by using fly swatter game, but the control class was
taught without using Fly swatter game. Pre-test and post-test were used to find the
data. This research was conducted in April to May, starting from 28 April to 31
May 2014. Pre test was given to know the early competence of the students both
in the control and experimental class. At the end, there was a post test that was
given for both experimental and control class. The result of the research showed
that there was a significant difference of the students’ vocabulary mastery
between the students who were taught using fly swatter game and those who were
taught without fly swatter game. It could be seen on the result of computation of ttest,
where t-result is 3.33 while the T-table value at the level of significant 0.05
for degree of freedom (df) 62 was 1.67. It means that t-test was higher than t-table
(3.33> 1.67). It could be concluded that the use of fly swatter game was effective
for teaching vocabulary.