In its two decades, Teach For America has dispatched more than 20,000 young teachers to work in some of America’s poorest schools and communities. The nonprofit organization, which sprang from a thesis that founder Wendy Kopp wrote in college, now provides teachers for some 500,000 urban and rural students each year and is a major employer of recent graduates of elite colleges and universities. TFA is celebrated by many as an innovative force in K-12 education. But critics question its short-term teaching commitments—two years—and say its recruits, though well educated and well intentioned, aren’t sufficiently prepared for the classroom. In 2011, TFA boasts of ever-more-intensive work in teacher preparation and development and of what it sees as the organization’s long-term impact on policy and practice. To mark TFA’s 20th-anniversary year, 2010-11, Education Week’s Commentary editors sought out a variety of perspectives on Teach For America and its effects on teachers, students, and schools. For more on TFA, read Education Week’s news coverage of the organization.