Evaluating teachers’ professional development initiatives (PDI) is one of the main challenges for the teacher professionalisation eld. Although di erent studies have focused on the e ectiveness of PDI, the obtained e ects and evaluative methods have been found to be widely divergent. By means of a narrative review, this study provides an extended framework to guide the evaluation of (the e ectiveness of ) PDI. Furthermore, and in accordance with this framework, an overview of measurement instruments that are currently in use is provided. The study concludes with implications for educational research and developers of PDI
