The government of the Republic of Indonesia has taken serious concern on the development of vocational high schools (SMK) recently. Various supports and programs are given by the government to realize one of the main purposes of ocational education; to equip the students of vocational high schools with the knowledge and, more importantly, skills in the professional world. The newest is the program of SMK Pusat Keunggulan (Center of Excellence). The program aims to develop vocational high schools with certain skill competences to improve their quality and performance through in-depth partnership and alignment with the business, industry, and professional world. One component to take into consideration in any efforts to develop the quality and performance of vocational high schools is to provide the students with English language teaching that is relevant to their skill competences. In fact, the government states that English is one of the subjects that should be prioritized due to the fact that English communication skill is an aspect that will potentially increase the competitiveness of the graduates in the professional world. Therefore the Directorate of the Development of vocational high school has developed the strategic plan through bilingual learning ecosystem to improve students' English proficiency. This study aims to investigate the implementation of English language teaching at vocational high schools in Jember, specifically the state vocational high schools (SMK Negeri). The case study focuses on how ELT is conducted at the vocational high schools dealing with the materials given to the students with various skill competences. Questionnaires were distributed to English teachers teaching at the state vocational schools to gather information whether or not the materials given to the students vary depending on their skill competences. Furthermore, selected teachers from each school were invited into the interview stage in order to confirm and clarify the responses collected from the questionnaires.