This quote says it all, in my opinion.
Roberts declined to talk about the disputes. “It’s an election time. People keep all this mess going to keep me from getting re-elected,” she said. “Everybody who sits on that board is not for an education for all children. We are divided on that school board by race, we are divided by politics, Republicans vs. Democrats.”
Roberts is wrong. These issues have not suddenly popped up because it's election time. The people who sit on the board who are not for all children are up for re-election and she is one of them. Yes, they are divided but it is due to ego-centric control issues, not Republican vs Democratic politics. The school board is a non-paritisan race. Roberts herself is the one pulling out the race card just before the election.