The aim of this research was to find out whether or not there was any
effect of the use of what’s missing game in teaching English vocabulary of
students especially of seventh graders. This research was conducted in one of the
junior high school in Banyumas in academic year 2014 / 2015. The participants of
this research were the seventh graders in one of junior high school in Banyumas.
There were two classes of which class A was used as a control class and class B
was used as the experimental class. Test was used in collecting the data of this
research, namely pre-test and post-test. The test consisted of multiple choice
items. Based on the computation, t-test result was 2.60 and the result of r-table at
the significant level 0.05 with the degree of freedom 58 was 1.6715. the
calculation of t-obtained was higher than t-table (2.60 > 1.6715). Based on the
research result, it showed that What’s Missing Game was effective for teaching
English vocabulary of students in SMP N 2 Banyumas in academic year 2014 /
2015.