The aim of this research was to find out the effectiveness of
Environmental Mnemonic Technique in teaching vocabulary in vocational
highschool. This research used quasi experimental method which the sample was
based on the school policy. The two choosen classes were LVE (light vehicle
engineering) C as the experimental class dan LVE D as the controll class. Pre-test
and post-test were used to collect the data. The test was in multiple-choice form
consisting of 20 items for each test. T-test formula was used to analyze the data.
The result of the research showed that there was a significant differences of the
students‟ mastery of vocabulary between the students who were taught using
environmental mnemonic technique and those who were taught using
convensional technique. It could be seen on the result of computationof t-test,
which t-result is 3,43 and t-table is 1,676 at the significant level α=0.05 in df=54.
The result was higher than t-table (3,43>1,676). It means that the hypothesis that
environmental mnemonic technique was effective to vocabulary mastery was
accepted.