Wulida Nurul Faqiah Pengarang Niken Kencono Ungu, M.Pd Dosen Pembimbing 1 Niken Kencono Ungu, M.Pd Penguji 2 Arif Widyantoro,M.Pd.B.I Ketua Penguji Buntara Adi Purwanto, S.S., M.Pd. Penguji 1

In the world of education, foreign languages is an important role toimproving students' knowledge. When someone can communicate well, it can beused as a bridge to obtain information. The purpose of this research are:1) Toknow how to improve vocabulary mastery in the first graders at MTs FutuhiyyahBumirejo. 2) To create interesting vocabulary learning media that suits the needsof students in the first graders at MTs Futuhiyyah Bumirejo. 3) To use ofwordwall media in the first graders at MTs Futuhiyyah Bumirejo in helping toimprove learning activities. The research method used is a true experimentalresearch method. Based on the research include the following 3 things: 1) For thefirst hypothesis, how the use of wordwall affects the level of vocabulary masteryof students. 2) The second hypothesis, that there is an increase in scores from theexperimental class pretest and experimental class postest obtained after thetreatment using wordwall media. 3) The third hypothesis how to result in thePretest Postest-Control Class value with the Pretest Postest-Experiment Class.Based on the result, it was able to know were the difference of the students scorein post-test of control and experimental class in vocabulary mastery. Result ofexperimental class found the highest score was 90,00, the lowest score was 70,00.In post-test of the control class found the highest score was 85,00, and the lowestwas 55,00. The result be concluded the experimental using wordwall media toimprove students' vocabulary mastery. Keywords : wordwall media, vocabulary mastery, learning process