21st-century skills are among the qualifications that teacher candidates should have in order to provide quality education, as in every business field. To achieve this, the renovation of educational programs and integration of those skills into the course process is recommended. Exploring the experiences of physical education teacher education students (PETE) in the learning ecosystem, which is created with peer mentoring in the movement education course, was the purpose of this research. In this case study, a movement education course was designed with three peer mentors and 25 peer learners. Data were collected through Instagram page posts, field notes, researcher meetings, and student reflections and then analysed with inductively constant comparison. It was found that peer mentors and peer learners showed flexibility and adaptability in working in their teams if teammates were making an effort and otherwise ignored each other. Because all peer groups prepared content and taught others, they used their productivity, and accountability was shown through reflections among peer mentors, peer groups and course leaders. So, PETE took responsibility for the learning process. Story-creating provided permanent learning, connected knowledge to daily life and raised awareness of PETEs. So, when the 21st-century skills are embedded in the nature of courses, quality education can be achieved. [This paper was published in: "EJER Congress 2023 International Eurasian Educational Research Congress Conference Proceedings," Ani Publishing, 2023, pp. 179-193.]