21st century initial teacher education [ITE] requires teachers and teacher educators to work together in the design and delivery of innovative learning experiences for student teachers. This study investigates a partnership that enabled the co-construction of one core course within a graduate ITE programme in New Zealand. Our partnership aimed to help student teachers to make links between theory taught at the university, and day-to-day practices in classroom settings. Using case study methodology, data were generated from participants in three primary/intermediate schools and one university to identify strategies that supported their collaborative process. Seven affordances were identified to facilitate this school-university collaboration, which enabled the development of a learning community wherein professional values and expertise were made visible, power was shared, and relational trust and respect grew. The findings offer insights for teacher educators and teachers seeking to open up a boundary space between universities and schools within which they might co-design and deliver an ITE course.