Classroom teachers play a pivotal role in the early identification and treatment of students with selective mutism. In order to successfully identify students and to collaborate effectively with a professional team, classroom teachers must educate themselves on the intricacies of this anxiety-based disorder. Students with selective mutism remain unidentified when classroom teachers are unaware of the presenting symptoms, available treatments, and proactive classroom-based interventions. In fact, without an adequate understanding of selective mutism, teachers could unknowingly be supporting mutism behaviours in the classroom. Teachers can be the first to connect students and their families with necessary support; but only if they are aware of the complexities of selective mutism.