Two years ago Romain Bertrand was a middle school math teacher, finishing his fifth year teaching in North Carolina’s Charlotte-Mecklenberg district and thinking he needed a way to reach more teachers and students. He moved to a new position mentoring and coaching teachers, but professionally, he felt stuck. “This wasn’t going to give my career the next steps I was looking for in terms of advancement and salary,” Bertrand said. “I felt the only possibility for me was leadership roles, like principals, but I didn’t have as much passion [for that].” In fall 2013, Bertrand will be one of 26 teachers in the district to manage several classrooms at once, in a program piloting one of several models from consulting firm Public Impact to expand excellent teachers’ reach.  Paying Great Teachers More “We were trying to achieve two goals,” said Bryan Hassel, Public Impact’s co-director. “How could you reach every child with an excellent teacher instead of just a fraction? And how could you...