Pennsylvania's first cyber charter school opened in 1998, enrolling 44 full-time students. From this modest beginning, Pennsylvania's cyber charter sector has grown to 16 schools enrolling 35,000 students from all but one school district in the Commonwealth. Pennsylvania has one of the nation's most extensive cyber charter sectors, and six additional proposed schools are before the Department of Education (PDE) for review. The recent growth in the sector coincides with increasing attention from state policymakers. As of this writing, there are at least 12 legislative proposals pending in the Pennsylvania General Assembly addressing cyber authorization, funding, or oversight. To help situate cyber charter schools within a state context, Research for Action (RFA) examined the state's recently-issued School Performance Profile (SPP) scores for the 11 cyber charters for which complete data are available. RFA then compared these scores to all public schools statewide, including traditional public schools and brick-and-mortar charters. RFA's analysis is based on publicly-available data from PDE's School Performance Profile. Also, given the relationship between student mobility and academic achievement, RFA examined enrollment into and out of five cyber charters for which data were available during the 2010-11 and 2011-12 school years. RFA reviewed the demographics of the student populations in cyber charter schools as compared to traditional public schools and brick-and-mortar charters. Main findings for these anlyses are reported here in tabulated form. A glossary of terms is included. Appendix A, "Cyber Charter Enrollment Trends for the 2011 and 2012 School Years", is presented in table 6.