Abstract :
This research was aimed to find out the use of wordwall.net as a media can
improve students vocabulary mastery at the eighth grade of SMP Negeri 40
Surabaya. The research subject was VIII A and there were a total of 31 students
with 17 male students and 14 female students. Classroom Action Research
(CAR) was used in this study which was conducted in two cycles. Each cycle
consists of planing, acting, observing, and reflecting. The technique of collecting
data were test and observation. The instruments were test and observation
checklist. This research was conducted by collaborating with the English teacher
of SMPN 40 Surabaya that was Roedjito, S.Pd. The results of this study, in cycle
1 there were 15 (57.69%) students passed KKM. And in cycle II there were 24
(92,30%) students passed value of Minimum Completeness Criteria (KKM) and
achieved the criteria of success. It could be concluded that the classroom action
research (CAR) was successful improve students vocabulary mastery through
the implementation of Wordwall.net at the eighth grade of SMP Negeri 40
Surabaya