As Diana Hess learned that airplanes had slammed into the twin towers in lower Manhattan on Sept. 11, 2001, her first instinct was to cancel her classes for the day, reports the Christian Science Monitor. But before she could, the University of Wisconsin education professor began receiving frantic calls from her students – pleading with her to hold class as planned. “They were concerned about how to teach about what had just happened,” Ms. Hess says. Her students were student-teachers who taught in classrooms – from kindergarten to 12th grade – in the mornings and attended college courses in the afternoon. “They had little experience with events of this scale and scope, and they wanted to get help on how to teach about the event with their children right away,” she adds…