DISRUPTING SCHOOL: Clayton Christensen sees the disruptions caused by online education gaining momentum, according to TNW Insider. He predicts by 2019, half of all K-12 classes will be taught online. Killer quote: "..The University of Phoenix is spending about $200 million every year on making their teaching better. 'That's $200 million every year just on making their teaching better,' he repeats. 'Do you know how much money Harvard spends every year to make its teaching better? Zero.'" Ouch. Calling Cambridge...