What my school is learning, and what current research suggests, is that teachers don’t improve by listening to someone tell them how to do something newer or better in their classrooms. They learn by working together to address problems they themselves identify in their schools and classrooms. This type of staff development goes by many names, but I’ll use the term “collaborative PD.” The problems with old PD are so many, and the benefits of collaborative PD so great, that the days are surely numbered for the former. Yes, old-style professional development is doomed.