This paper presents an Interpretive Framework stemming from a longitudinal and iterative multiple case study of five Australian universities examining the cogent and unique practices underpinning their established and successful school-based science teacher education programs. Results from interviews with teacher educators, school staff and pre-service teachers, show four components that guide the successful and sustainable use of university-school partnerships. These components: Guiding Pedagogical Principles; Growing University-School Partnerships; Representations of Partnership; and Growth Model provide a scaffold for initiating, growing and sustaining partnerships that maximise the benefits for all. The essential role of both university and school staff is also highlighted.