Five years ago, North Carolina started an effort to put all of the state's public schools on one computer network. The state has spent $113 million so far, and it expects the tab to total at least $150 million. But just six of the state's 117 school districts are now on line, and that's as part of a trial. And the teachers who are on the network say it's difficult to gain access to the network or to do even simple things such as enter daily attendance.