Purnamasari 2019. The Effect of Using English Song as Teaching Media to Improve Vocabulary Mastery on The Eleventh Grade Students of SMK Negeri 11 Samarinda in 2018 / 2019 Academic Years. Thesis. English Department, Faculty of Teacher Training and Education, Mulawarman University. Advisor (1) Dr. Hasbi Sjamsir, M. Hum, (2) Effendi Limbong, M. Ed, Ed. D.

The objective of the study was to find out signifcant difference using English songs and conventional method to improve vocabulary mastery on the eleventh- grade students of SMK Negeri 11 Samarinda in 2018 / 2019 Academic Years, and to find the use of English songs as teaching media effective to increase learning result on vocabulary mastery for the eleventh-grade students of SMK Negeri 11
Samarinda in 2018 / 2019 Academic Years.. The technique sampling was used in this research namely cluster random sampling which thus method to determine sample based on a cluster of the group and homogenous samples.
This study involved 60 students of the eleventh-grade students of SMK Negeri
11 Samarinda in the 2018/2019 academic years. The objects of the research were randomly taken and divided into two classes namely XI A class that consists of 30 persons was assigned as the experimental group and XI B class that consists of 30 students was assigned as the control group. From the instrument try out was found that 20 test questions can be said valid with a reliability coefficient of 0,889 which means very reliable. These items questions were given to the two groups as pre- test and post-test. The data were collected by means of descriptive and inferential statistical techniques. The test of normality and homogeneity was done before the test of the hypothesis was applied while a t-test was conducted to test the hypothesis.
The result of the study shows there are a significant difference between using English song with conventional method who are taught by the teacher for the elevent-grade students which are the significance value amount of 0,000 lower than 0,05 and t-value higher than t-table or 7,421 higher than 2,002, and then the use of English songs enough effective as teaching media to increase learning result on vocabulary mastery for the eleventh-grade students of SMK Negeri 11
Samarinda because N-gain score for the experimental class amount of 0,50 with the percentage that obtained amount of 56,55% higher than N-gain score for the control class amount of 0,34 with the percentage that obtained amount 33,56 or
34% so it can be concluded that the use of English songs could effect to improve for the students in vocabulary mastery.

Keywords: Song Lyric, Teaching Media, and Vocabulary Mastery.