The core work of the National Center on Scaling Up Effective Schools consists of four stages: identifying practices of highly effective high schools, designing interventions and transfer of practices, evaluating the intervention's implementation and effects, and evaluating implementation at scale. The purpose of this report is to describe the methodology used for selecting two high value-added and two low-value added schools in one of the partner districts for intensive field work in year one of the Center. Florida and Texas were selected for study of scaling up effective practices in high school because they have two of the most comprehensive student-level administrative and achievement data systems among the 50 states. While NCLB only requires states to test once in the high school grades, both Texas and Florida test English/language arts and mathematics in more than one high school grade, improving the ability to identify effective and ineffective schools. As part of the proposal for the Center, initial analyses using statewide data were conducted in both Florida and Texas. The goal was to identify districts that had both highly effective and low-performing high schools for students in traditionally low performing subpopulations to serve as both sites of research in which to identify effective practices and sites of intervention to which to transfer those practices. This report describes how Broward County Public Schools (BCPS) compare in value added to other schools in Florida, as well as how the four case study schools were identified. (Contains 2 figures, 9 tables, and 6 footnotes.)