On a lower level of the Wynne Unit, a state prison in Huntsville, about 20 men in white jumpsuits and matching white sneakers sit around the perimeter of a room. Their attention is focused on Paul Allen, who stands in front of them. He’s a familiar face in the unit of about 3,000 male prisoners: He’s been teaching there for years. Today, he’s leading the men through their capstone business course, for many the final step on the path to getting their associate of applied science degrees in business.