The first five articles of this series on technologies that enable collaboration, highlighted ways to foster shared learning experiences among students. For this, the final installment, focus is shifted to teachers. States, districts, and groups of teachers are enhancing their collaboration opportunities through synchronous online meetings and asynchronous discussions, enabling teachers to reflect on their own work and form new relationships around common topics of interest. Three ways of making online collaboration work are described in this article: (1) Video learning communities; (2) Cloud Conferencing; and (3) Communities of practice. [To view article 5 of this series "Collaborative Technologies: Crossing the Device Divide," see EJ1017991.]