In recent years, the notion of 'English as a lingua franca has emerged to characterize communicative exchanges between and among speakers of diverse first languages. ELF is a growing area that focuses on and reflects the reality that many non-English-speaking users use English to interact with one other rather than native English speakers under global English, which includes all English(s) used across the world. The term ELF extends beyond conventional native and nation-bound varieties, and ELF users are free to accept, modify codes, and create new types of Englishes that differ from standard Native English requiring no native speaker sanctions by "skillfully co-constructing English for their own purposes" by "skillfully co-constructing English for their own purposes". The researcher focuses on the teacher’s perception about the application of English lingua franca. The aim of this study is to investigate the teacher’s perception about the application of english lingua franca in SMA Unggulan Haf-sa Zainul Hasan Genggong Probolinggo. The descriptive qualitative method was chosen to be used in this study. The researcher obtains the data by using interview guideline. After conducting the interviews, the interview data will be transcribed, analyzed, and interpreted qualitatively to document and refine the research findings. The results of this study reveal three themes: learning objectives, learning materials, and learning strategies. The results of this study also indicate teacher responses or perceptions are positively related to the application of ELF in English teaching and learning activities, according to Mrs. Aini, by applying the ELF approach in learning can make students more active, communicative and not feel burdened by school rules that require the use of full English when learning