This study investigates how teacher-student relationships develop. If a teacher is able to foster high-quality relationships with all students, will students work harder in the classroom? An understanding of how teacher-student relationships develop is critical to answering that question. In this investigation, the authors follow a holistic case study tradition to explore teacher-student relationship development. Five themes emerged that collectively describe the development of teacher-student dyadic relationships. The authors explore how descriptions of dyadic relationship development offered by teachers and students align with Leader-member Exchange theory and discuss implications for practice and future research.