The purpose of this study was (a) to examine the manner in which teachers who were experiencing the implementation of an organisational reform perceived their own professional development process, and (b) to observe the manifestations of these perceptions in the development patterns exhibited among the teachers. The findings identified two dimensions that characterise teachers’ professional- development perceptions and goals: teachers differ from each other in terms of the source of their motivation for professional development (intrinsic or extrinsic), and in the type of development they aim for (lateral or vertical).