Who’s better at teaching difficult physics to a class of more than 250 college students: the highly rated veteran professor using time-tested lecturing, or the inexperienced graduate students interacting with kids via devices that look like TV remotes? The answer could rattle ivy on college walls, the Associated Press reports. A study by a Nobel Prize-winning physicist, now a science adviser to President Barack Obama, suggests that how you teach is more important than who does the teaching…