This study investigated how international students were reflecting the social learning environment and 21st century learning skills. As part of their bachelor of art studies in Finland, the teacher trainees carried out the practical training in their homeland and produced portfolios about pedagogic solutions they used. Out of 139 (n = 139) portfolio text passages in total 46 (n = 46) were included in the data. In the theory-driven content analysis, we identified four dimensions: scarcity, individual, teamwork and professional development. The most of the passages contained reflections on communication or collaboration. The trainees reflected versatile learner-centred activities such as collaborative learning, pair work, debate and games. The teacher trainees implemented the ideas learned in Finland and transformed them in the context of their home country. The results of this study provide necessary information for quality assurance in the curriculum development in both countries.