Having spent 25 years at Saint Paul (Minn.) Public Schools, Valeria Silva has seen more than just a few changes in her district. Since 1990, the number of English language learner students has more than tripled from 4,633 students to 15,772. In 1975—10 years before Silva arrived—the district had 100 students from Asia. Today there are 11,000. Silva has spent her entire career at SPPS, which now has 64 schools and 38,500 students, and became its superintendent in 2009.