This paper reports on case studies of three teachers managing an education reform focussed on assessment, during a busy period of curriculum change in an Australia state Participants attended multiple professional development opportunities including a number of state-wide, systemically-facilitated assessment workshops. The most significant finding to emerge, as narratives of change unfolded over a nine- month period, was the diversity of teachers' approaches to change. All three were insightful about practices that required change and could identify personal and professional attributes that would assist their management of change. All teachers attended the same systemic workshops and all had access to the Education Department's published literature about assessment. Yet they organised and implemented change in very different ways. Each teacher's approach was based on personal assumptions about learners and learning, the reform they agreed to implement, and their preferred approaches to incorporating new assessment practices into their existing repertories. Approach taken was a major determinant of experience of change and thus is an aspect of change management important to inservice-providers, teachers and school leaders. The paper concludes with an overview of a PD package designed with the findings of this research project in mind.