The growing expectations and demands for teacher education highlight the need to provide future teachers with more knowledge and to prepare teachers as expert collaborators who can learn from each other. This qualitative case study based on video-recorded reflective assignments investigated how Finnish pre-service special education teachers' experiences in relational interprofessional work within institutional boundary spaces -- the so-called knotworking -- contributed to the evolution of their professional agency. The results indicate that interprofessional collaboration during teacher education was challenging and orienting themselves as students was the principal way teachers negotiate their role within boundaries.