How David Karp left school, found success
                                
                                
                                    (Newser) -
                                    At 14, David Karp—who would one day found Tumblr—was already obsessed with computers and bored with school. So his mom, a science teacher, suggested he drop out. "It became very clear that David needed the space to live his passion. Which was computers," Barbara Ackerman tells...