THE USE OF AUDIO VISUAL AIDS IN IMPROVING STUDENTS’ VOCABULARY MASTERY IN WRITING DESCRIPTIVE TEXTS : A Quasi-Experimental Study at the Second Year Students of a Junior High School in Bandung

The study aims to investigate if the audio visual aids can improve students’ vocabulary mastery and to investigate the students' responses toward the use of those audio visual aids. To achieve these aims, quasi-experimental research design was employed. The data were gathered from eighth grade students in a junior high school in Bandung. Two classes contained 60 students were taken and divided into experimental and control group. Some instruments like pre-test - post-test and questionnaire were employed to collect the data. At the end of the study, both groups indicated to experience improvement, but experimental group showed more advanced enhancement indicated by their four times larger effect size. It also indicated good responses from the 90% of the students. Furthermore, this study also figured out some factors which were influence those students’ improvement. Those factors were media and teacher. Therefore, those factors are needed to be concerned before the audio visual aids are implemented in the teaching learning process