Examining The Implementation of Genre Based Approach in English Lesson PlansRamaliah MosiiSiti NafisahauthorLesson plans are essential tools that guide teachers in delivering effective classroom instruction. With the implementation of the Merdeka Curriculum, the Indonesian Ministry of Education mandates the use of the Genre Based Approach (GBA) in English teaching. However, gaps remain in how teachers apply this method in their lesson plans. This research aims to examine how the Genre Based Approach is implemented in English lesson plans and actual classroom practices. The theoretical foundation is based on Emilia (2021), who emphasizes that GBA connects language teaching with social context through structured stages that help students understand and produce texts in various genres. The data were collected through document analysis and semi-structured interviews. Employing a thematic analysis design, this research analyzed lesson plans from five English teachers across different schools. The findings reveal that while most teachers included components aligned with GBA such as general information, lesson design, assessment & feedback, and stages like BKoF, MoT, JCoT, and ICoT, some only partially implemented these stages due to classroom limitations. The study concludes that teachers require further professional development, particularly workshops on GBA to enhance their lesson planning and fully integrate genre-based teaching strategies. This recommendation is supported by the belief that GBA can promote deep learning by guiding students to understand how a text is organized and why it is used in a particular social context. Keywords: English Language Teaching, Genre-Based Approach, Lesson PlanPENDIDIKAN BAHASA INGGRIS2025Universitas Pakuan;Pendidikan Bahasa InggrisThesis