Teacher communication influences students’ cognitive and emotional well-being, yet mechanisms linking communication behaviors to learning outcomes remain underexplored. Grounded in the conservation of resources framework, this study tested an ecological model in which teacher clarity and rapport indirectly reduced writing apprehension through perceived immediacy, self-efficacy, and burnout. Undergraduate students ( N  = 389) in Business and Professional Communication courses completed validated measures. Structural equation modeling supported a serial mediation: clarity and rapport predicted immediacy and self-efficacy, which reduced burnout and, in turn, writing apprehension. Findings highlight burnout as a psychological conduit linking instructional communication to student anxiety.