(CNN) -- Early in her career as a learning specialist, Mary Willingham was in her office when a basketball player at the University of North Carolina walked in looking for help with his classwork. He couldn't read or write. "And I kind of panicked. What do you do with that?" she said, recalling the meeting. Willingham's job was to help athletes who weren't quite ready academically for the work required at UNC at Chapel Hill, one of the country's top public universities. But she was shocked that one couldn't read. And then she found he was not an anomaly. Soon,...