Purpose: To explore preservice teachers' (PSTs) implementation of cooperative learning (CL) during their school-based student-teaching after undertaking a CL course in a Chinese physical education teacher education program. Method: An interpretive qualitative case study design gathered data from eight PSTs using classroom observations, semistructured interviews, reflective journals, instructional materials, and field notes. Interactive cycling coding was used to analyze the data. Findings: The two themes, "putting five key elements into practice" and "learning to facilitate with CL," convey how the PSTs implemented the procedures of CL and adapted CL to the contexts they were teaching in. Discussion and Conclusions: The eight PSTs appropriately implemented CL and contextualized CL practice in their classrooms. They shifted their teaching approaches away from direct instruction and toward more independent, pupil group-based tasks. This growth is particularly important in the Chinese physical education context, where policies advocate for CL yet student-centered teaching which is rarely seen in practice.