When I was in college, the best way I found to take notes was when the professor would hand out printouts of his slides, with some details left out. then i could just fill in the blanks, and wouldn't have to write so much that I couldn't really think about what was being said, but still ended up with complete notes. If this could be done on some sort of tablet, they they'd probably have some serious power. also, students who don't want to pay attention won't learn, will always find a way to waste time, and that's their problem. if they're not distracting other students, then I don't really see it as the professor's problem.