The goal of this study was to explore educational strategies to teach repurposing, in the apparel design classroom guided by the gold standard project-based learning (GSPBL) model. The researchers collected and analysed project reflections from participants over four semesters, utilising a qualitative research approach. Results of the data analysis impacted the evolution of the project (four iterations) and suggested five instructional practices to build upon the project structure to teach repurposing in the apparel design classroom. Educational strategies made throughout the study influenced students’ approach to their design process, conscientious of textile waste, and perception toward repurposing. Successful outcomes of the study included the development of transferrable skills, such as creative and critical design thinking, problem-solving, and time management, as well as learning satisfaction. Additionally, findings of this study contributed to the body of knowledge of sustainable design: repurposing. Overall, this research guides teaching sustainable design practices.