THE EFFECTIVENESS OF THE BABYBUS SERIES IN ENHANCING FIFTH-GRADE STUDENTS’ MASTERY OF ADJECTIVE VOCABULARY

Vocabulary becomes important since it significantly influences the students’ achievement of English primary skills. Then, it is important to introduce vocabulary learning to the young learners, especially to construct a strong understanding of basic vocabulary knowledge. The aim of this study was to explored further the effectiveness of the BabyBus Series as a medium for enhanced fifth-grade students' vocabulary mastery. This research used a quantitative approach with a quasi-experimental design. Then, the time of data collection in this research was only 4 meetings, consisting of:(1) Pre-Test, (2) Treatment 2 meetings, and (3) Post-Test. The data collection technique used a vocabulary test that contained 15 questions that were adapted from an English Textbook. Moreover, the results of this research showed that students in the experimental class that used the BabyBus series achieved an independent score of 0.025, indicating a significant difference between the experimental and control classes. In conclusion, yes, the Babybus series was effective in enhancing their vocabulary mastery better than conventional media.