Rudy Crew has had an eventful career in education. He\'s run two of the four largest school districts in the United States—New York City in the 1990s and Miami-Dade County from 2004 to 2008—where he initiated ambitious policies and programs but left amid controversy. In New York, he took over and rejuvenated some of the city\'s poorest-performing schools, but was forced out in 1999 after clashing with then-Mayor Rudolph W. Giuliani. In Miami, Mr. Crew offered salary increases to teachers who would transfer to the worst schools and got more students to take Advanced Placement tests. But in 2008, the same year he was named National Superintendent of the Year by the American Association of School Administrators, he was fired after a long, escalating spat with the school board. Since then, he\'s worked as an education consultant with Global Partnership Schools, which he co-founded, and is teaching at the Rossier School of Education at the University of Southern California. Last month, Mr. Crew, 61, was named president of Revolution K12, a Santa Monica, Calif.-based provider of adaptive-learning software in math and English. Education Week Staff Writer Jason Tomassini spoke with Mr. Crew last week in a telephone interview about his move into the educational technology marketplace, the differences between the public and private sectors, and the changing role of teachers in the classroom.