Repository Universitas PakuanTeacher's Straregies to Develop Students' Vocabulary MasterySiti HajarRosaauthorVocabulary is an important component in learning English, as it plays a vital role in helping students develop their leanguage skilss. A strong vocabulary foundation enables students to understand reading materials, express their ideas in writing, and communicate effectively in both spoken and written forms. Therefore, students must master vocabulary to support their success in learning English. To assist students in improving their vocabulary mastrery, English teachers are required to implement effective and appropriate teaching strategies taht match students' needs an learning styles. Therefore, the paper entitled "Teachers" strategies to develop students' Vocabulary Mastery". The objective of this research was to identify what are the strategies taht esud by English teachers to develop studentd' vocabulary mastery in 11th grade at SMA Negeri 1 Jonggol and 10th grade at SMA Negeri 2 Jonggol. The researcher used descriotive qualitative method to provide a detailed description of the strategies applied by the teachers. The data were collected through documentation, observation, and interview. The results of the study showed that the English teachers implemented audio presentation strategy and visual strategy in whislist-activity. The first English teacher used English audio stories from her own collection and the second English teachers used Youtube video from various channels. Both teahcers made significant efforts to improve students' vocabulary mastery by intergrating these strategies into their teaching practices. Keyword : Teachers' Strategies, Vocabulary Mastery, Audio Presentation Strategy and Visual StrategyPENDIDIKAN BAHASA INGGRIS2025Universitas Pakuan;Pendidikan Bahasa InggrisThesis

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