This study describes a change process of implementing role-plays in a course on workplace communication in English, and of engaging in retrospective reflection. Considering that English education for nursing students in Taiwan has focused on the development of medical terminology and that students' communicative competence is the main deficiency, the author conducted the change process in a medium-scale district hospital where she worked as a clinical nurse and in a nursing college where she taught English as a part-time teacher. The results show that engaging in retrospective reflection allows a teacher to construct knowledge from experience for professional growth.