A Day in the Life of a New Type of Professor

For faculty members at NYU's online subsidiary, selling goes hand in hand with teaching

By SARAH CARR

New York

"Either move with the times or die by the sword," Sally Silberman quips as she drives into SoHo. She's spent the last few hours talking with a passenger and making cell-phone calls -- to a colleague, to her boss, to her hairdresser -- while traveling her weekly route...