Extension Online is an Internet-based online course platform that enables the Texas AgriLife Extension Service's Family Development and Resource Management (FDRM) unit to reach tens of thousands of users across the U.S. annually with research-based information. This article introduces readers to Extension Online by describing the history of its development, outcomes achieved over a 5-year period, system features, and the strategies that have led to the growth of the online system. In 2011, over 77,000 online courses were completed through Extension Online, demonstrating that technology can be successfully used to dramatically enhance Extension's outreach capabilities.