Current trends, tensions and unresolved issues in research on teacher professional learning

This article focuses on current trends, tensions and unresolved issues related to teacher professional learning during a time of considerable change around the world. Rather than write an exhaustive literature review we identified four topics that have played a critical role in the field over the past decade. This article reviews literature on the following topics: (1) practice-based professional development; (2) online professional learning; (3) facilitation of professional development, and (4) PD focused on supporting diverse learners. Within each topic we highlight active areas of investigation and selected research findings, and conclude each section with questions yet to be answered.