The use Audio Visual Aids on Students' Vocabulary Enrichment.NurjamilahNurjamilahauthorMastering English for the young learner is related closely to the ability of knowing and using vocabulary contextually. However, during the English session, some students find it quite difficult to do so. Additionally, the media used by the teacher is not enticing to make the students feel motivated. Therefore, the research to tackle this problem is needed. This research employs Quantitative One Group Pre-Test Post-Test research design. It involves a class of the fifth grade, which consists of 28 students, in SDN Selakopi Bogor, West Java, as the sample for this research. The objective of this research is to measure whether or not Audio Visual aids is effective to enrich the students’ vocabulary level. Moreover, the instruments for this research are pre-test and post-test. The finding of this research is analyzed by using t-test calculation. The result of this research showed mean score for pre-test was 60.7 while the mean score for post-test was 77.5. Additionally, t-observed was 10, while the t-table with the df value of 27 at the significant level of 0.05 was 2,05. According to the result, it was concluded that the alternative hypothesis of this research was accepted, because the value of t- observed was higher than the t-table (10 > 2.5). This also meant Audio Visual Aids was effective to enrich the students’ vocabulary mastery. Keywords: Audio Visual Aids, Vocabulary EnrichmentPENDIDIKAN BAHASA INGGRIS2020Universitas Pakuan;Pendidikan Bahasa InggrisThesis