As schools began installing computers and networks in classrooms two decades ago, few of us could have imagined how integral technology would become to our professional practice and our everyday lives. Technology has facilitated new ways of teaching and learning. Technology has affected not only the way students learn, but the way teachers learn as well. Informally, teachers learn from one another by documenting and discussing their work on the Internet through video sharing, social networking, and blogging. More formally, teachers take online courses, attend webinars, and participate in virtual conferences to stay current with professional standards and practice.  Increasingly, school districts and other professional development providers are turning to technology. Online professional development has distinct advantages. Because most teachers have access to the Internet