Between 1990 and 2010, the English language learner (ELL) population in U.S. schools grew by 80 percent. While the highest concentration of English language learners, now more commonly referred to as emergent bilinguals (EBLs) remains in the traditional immigrant destination states of California, Texas, New York, Florida, Illinois, and New Jersey, in all 50 states there are growing numbers of emergent bilinguals. Interest in these learners has encouraged...