Many school districts have adopted professional learning communities, and with good reason. If we are going to transform our schools, the people most responsible for accomplishing that task need time to work together to make sense of your vision.
Professional learning communities offer an opportunity for teams of teachers to do just that. However, just because you pull a team together, doesn't mean that it is going to be effective. Vivian Troen and Katherine C Boles outline Five Conditions of Good Teams in this Harvard Education Letter.