“…Historically underserved and concentrated in underresourced schools, language minority students in the U.S. disproportionately demonstrate difficulties with reading comprehension (Kieffer, 2008(Kieffer, , 2010National Center for Educational Statistics, 2009). A growing research base supports the notion that L2 learners of English typically demonstrate below-average levels of English vocabulary knowledge (e.g., Garcia, 1991;Manis, Lindsey, & Bailey, 2004;Páez, Tabors, & López, 2007;Proctor, Carlo, August, & Snow, 2005;Swanson, Sáez, & Gerber, 2006). However, the majority of these studies have utilized a single measure of vocabulary breadth, raising questions about how differences between L1 and L2 learners' vary across different aspects of English vocabulary knowledge.…”