The document is a doctoral thesis submitted by Emi Emilia to the University of Melbourne in partial fulfillment of the requirements for the degree of Doctor of Philosophy. It investigates the effectiveness of using a critical genre-based approach to teach academic writing to English as a foreign language students in an Indonesian university. The thesis contains five chapters that provide background on English education in Indonesia, a literature review on critical thinking, critical pedagogy, critical literacy and systemic functional linguistics, the research methodology used, an overview of the teaching program implemented, and a discussion analyzing student texts produced during the program. The findings revealed that the critical genre-based approach was successful in improving students' argumentative writing skills and developing their critical thinking