As the largest school district in Nevada and the fifth-largest school district in the country, Clark County School District (CCSD) served approximately 310,000 students in 341 schools during the 2010-2011 school year. Typical of urban districts, more than half of its students are eligible for free or reduced-price lunch, and 68 percent are students of color. Many schools are located in neighborhoods of concentrated poverty, as well as racial and linguistic isolation (Terriquez, Flashman & Schuler-Brown 2009). Also, the patterns of enrollment show dramatic increases in the proportions of English language learners (ELLs) in CCSD over the last two decades