This study explored the impact of critical pedagogy training for IELTS teachers on their students’ self-regulated learning. It also examined the relationship between students’ self-regulation and their IELTS performance, as well as how teachers implemented critical pedagogy principles in their classrooms. A mixed-methods research design was used, combining quantitative and qualitative approaches. 30 IELTS teachers and 150 learners from a language school in Tehran were recruited based on non-random convenience sampling technique. Teachers received training in critical pedagogy, after which learners completed a self-regulation questionnaire both before and after the intervention. Language proficiency was assessed using two official IELTS mock tests. Classroom observations and semi-structured interviews with teachers provided qualitative insights into instructional practices. Results showed that learners whose teachers received the training had significantly higher self-regulation scores post-intervention compared to a control group. A positive correlation was found between self-regulation and IELTS performance. Observations and interviews revealed that trained teachers used more dialogic, student-centered methods that promoted autonomy and reflective learning. The findings suggest that critical pedagogy training can effectively enhance both learner autonomy and exam preparedness. These results have implications for improving teacher education and classroom practices in high-stakes language testing environments.