Upcoming retirements combined with growing enrollments mean 2 million new teachers will be needed in the coming decade. Coupled with the demands of the No Child Left Behind Act and high turnover, especially in troubled high-poverty schools, the teaching profession faces daunting challenges. The U.S. News Ultimate Guide to Becoming a Teacher, from the education experts at U.S. News & World Report, offers a complete overview of the turmoil in the profession...