By accepting a job as superintendent of a new Tennessee school district, Chris Barbic has positioned himself as the face of an up-and-coming governance model for reforming failing schools, the Huffington Post reports. The state of Tennessee tapped Barbic, a successful charter school organizer, to run a new special “Achievement School District” that encompasses five of the state’s worst-performing schools, officials announced this week. The arrangement puts the state in control of these schools and allows the state to contract the schools out to charter school networks or form partnerships with non-profit organizations…