This chapter presents the Unified Professional Development Project for Teachers and Student Teachers (UPDP), an educational initiative at the Department of Curriculum Studies, the University of Hong Kong. UPDP attempted to link teacher education with school improvement and was committed to enhancing the professional development of teachers from teacher preparation throughout their entire teaching careers by means of collaboration between Hong Kong schools and the University of Hong Kong in partnership. This chapter describes the major components of UPDP – the School-University Partnership Scheme, the Unified Professional Development Fellowship, and the School-based Development Consultancy. It also examines the project’s impact on schools, particularly student teachers and school mentoring teachers, and how UPDP interacted with the culture of the schools to contribute to teachers’ learning and professional development. It also explores the possible contributions of the development of a mentoring force in schools to improving the quality of education in Hong Kong.[Copyright © 2004 The Chinese University Press, Hong Kong Institute of Educational Research.]