The document discusses innovative approaches to professional development (PD) for teachers. It notes traditional PD models are often not learner-centered, knowledge-centered, assessment-centered, or community-centered. The document then describes an alternative called "Edcamp" which flips the traditional transmission model of PD to one where teachers construct knowledge together in sessions they build themselves during the day. It presents Edcamp and professional learning communities (PLCs) as a combined approach that could make PD more effective.