The thesis discusses teaching vocabulary of adjective through song. The background of this study is some of teachers still used conventional method in teaching learning process. The teachers need media to help teachers make the classroom atmosphere will be interested. The study is aimed at responding the following question: “How is the effectiveness of teaching vocabulary of adjective through songs to the students?”. The topic discussed through conducting test at eight grade of SMP N 2 Gubug. The data is gathered through conducting tests; pre test and post test, documentation, and interview. The data uses quantitative research approach, by using true experimental design. And the hypothesis was tested using t-test formula.
The study shows that the use of song is effective in teaching vocabulary. It can be seen from the result of test score. It shows that the experimental class which is given by using song of teaching vocabulary gets higher mean score that is 86.32 compared to the control class which are not given the same treatment. This class gets 81.71. But the use of song as a teaching technique is more effective than the traditional technique. It is caused the test by means of t-test formula shown that tcount = 2.09 > ttable = 1.67 at 0.05 level of significance by 56 degrees of freedom. This study can show the teachers that the teachers have to need media to make the students interested in teaching learning process. So, it can motivate the students improve their English skills, especially mastering his vocabulary adjective by listening music. And from this study, the researcher will get some new experience and knowledge in teaching vocabulary of adjective and it contribution for the future as a teacher. The researcher hopes that this research can be useful for the future researchers, english language teachers, and the students.