Christian Science Monitor: Greg Craven is flat out. The fifth-period physics class he teaches is about to start, and there’s still lesson planning to do. But at his cluttered desk over by the window, he’s e-mailing last-minute changes to his guest column scheduled to run tomorrow in The Oregonian newspaper. And a producer from National Public Radio in New York has called about setting up an interview. You could say this all illustrates chaos theory, he observes – searching for underlying order in things that …