Abstract
The objectives of this research were to see whether any significant improvement of students’ vocabulary achievement and to find out which type of vocabulary has the most significant improvement. The design used was the one group pre-test post-test. Vocabulary test was the instrument to measure the pre-test and post-test. The result shows that the mean score of pretest is 64.33 while the mean of posttest is 75.20, with the N-gain number is 0.3047. It can be concluded that there is an improvement in students’ vocabulary achievement after implementing picture series in the learning process. The students’ scores in all types of vocabulary were increased. However, the most improved aspect was noun. The mean of this aspect in posttest (11,3) was higher than the mean in pretest (7,3) with the gain of 0,45977.
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