Travel to Prairietown School, a small elementary school in a rural region of our country. Until recently, its population consisted of English-speaking administrators, teachers, students, parents, and community members. While its educators have not changed, they have begun to notice a small number of English learners (ELs) enrolling in the school. Continue traveling to Oceanside School, a suburban coastal community that has about 50 Spanish-speaking ELs in its district. Educators there also are noticing a difference; the number of students who are ELs is increasing rapidly, as is the number of languages that they speak. Finally, travel to Bustle City, an urban high school. English-speaking students used to be its dominant population. Now, English learners are the majority, and a growing number have had ...