This research is driven by the significant shift in teacher roles from primary information providers to facilitators within student-centered learning models, which inherently alters classroom social dynamics. The study aims to identify the types of social dimensions in teacher-student interactions, analyze their realization through a Critical Discourse Analysis (CDA) lens, understand the underlying ideologies, and compare theoretical frameworks with actual classroom implementation. Using a qualitative approach with Critical Discourse Analysis (CDA) based on the theories of Teun A. van Dijk and Norman Fairclough, this study focuses on interactions in an eleventh-grade English class (Class XI Plus D) at SMA Negeri 1 Kutacane. Data were collected through observations of English teaching and learning sessions. The findings reveal four primary social dimensions: Power, Access, Dominance, and Control, which oscillate between hierarchical authority and collaborative engagement. While the teacher employs "soft power" and provides "access" to students, a "negotiated control" exists where the teacher remains the final arbiter, leading to a "mock democracy". The study concludes that a gap persists between the ideal student-centered model and practice, as interactions remain constrained by traditional patterns. Suggestions for future research include conducting longitudinal studies and incorporating "student voice" or multimodal analysis to gain a more holistic understanding of classroom power struggles
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