The literature and research on online learning has grown significantly in the past decade. Many studies have been published that examine the extent, nature, policies, learning outcomes, and other issues associated with online instruction. Much of this literature focuses specifically on postsecondary education. With almost 4 million students or 22 percent of the higher education population presently enrolled in fully online courses, it would be appropriate to consider that online instruction is maturing in postsecondary education. However, the same cannot be said about online learning in primary and secondary education where online instruction is still considered to be in its nascent stages. There is also a growing need to examine issues related to online instruction in K-12 schools in order to inform policymakers at federal, state, and local governing agencies who are considering how to use this technology to expand and maybe to improve instruction. Several major state-level policy initiatives (e.g., Michigan, Alabama) have recently been undertaken that require much greater use of online instruction in K-12 schools. In 2007, the Sloan Consortium issued a report on the extent and nature of online learning in K-12 schools. Entitled, "K-12 Online Learning: A Survey of U.S. School District Administrators", this report was welcomed by professional organizations and the popular media interested in the use of online technology for instruction in the public schools. The report, which will be referred to as the "original study" throughout this report, was one of the first to collect data on and to compare fully online and blended learning (part online and part traditional face-to-face instruction) in K-12 schools. It was based on a national survey of school district administrators during the 2005-2006 academic year. The purpose of this current study was to replicate the original study in order to substantiate its findings and to examine what if any changes occurred in online learning in K-12 school districts. The current study was conducted two years later and was based on a national survey of school district administrators during the 2007-2008 academic year. [For the original report, "K-12 Online Learning: A Survey of U.S. School District Administrators", see ED530103.]