At Hiawatha Academies’ elementary school in the Morris Park neighborhood of Minneapolis, signs welcome immigrants in multiple languages. Over 75 percent of students there are learning English as a second language, and most are the children of Hispanic immigrants. Hiawatha runs some of Minnesota’s best public schools for serving such students; the Morris Park school, where math and literacy proficiency rates for students learning English are more than double the statewide averages for that group, is one of its flagships.