The article shows the experience of professional development over the course of a decade of one teacher's career nested against the backdrop of one reforming middle-school context in the USA. Through the use of four fine-grained narrative exemplars, the campus professional development trajectory is examined from the vantage point of Daryl Wilson,…

Just as linguistic errors have provided insights into the nature of linguistic competence(s), detailed analyses of blind spots or "marked trajectories" in the reflection cycles of novice teachers may provide a window on their underlying beliefs, and thus on relevant zones of proximal development. In this paper we analyse a case study in an…