This longitudinal study builds on conceptualizations of dialogic inquiry to examine how teachers and students coconstructed a discourse of inquiry in a public magnet school. The authors examine the processes and practices that make up this discourse of inquiry. Furthermore, they also study the function of teacher talk in supporting academic and social learning and agency among students. This discourse of inquiry supports students as active, thoughtful, engaged learners and community members. Furthermore, this discourse underscores the critical role of classroom talk, collaboration, and deliberation in meaningful learning engagements.