The successful few study for at least five years and are actually taught how to teach (you would be surprised how rare this is on teacher-training courses).
Though the classes are led by Duke professors, he said, "they're not taught the way we teach Duke courses" because they don't have a set meeting time, nor do they involve face-to-face instruction.
For example, she shared the story of Staff Sergeant Shaun Murphy, an Army veteran who taught sixth grade special education in Delaware for Teach for America.