Mayor Bloomberg might be guaranteed four more years in office, but that doesn’t mean Schools Chancellor Joel Klein is, David Bloomfield writes in the community section.

Who might replace Klein if he leaves Tweed? Bloomfield highlights several possibilities, including Chief Schools Officer Eric Nadelstern and New Visions for Public Schools President Robert Hughes. And he’s looking for more suggestions:

Assuming Bloomberg is a lame duck, his choice of Chancellor — or a decision to keep Klein — is especially hard to predict. Since the selection of Chancellor need not be approved by the City Council or other body, the choice is largely the Mayor’s alone. So choose from the above or write someone in: The betting window is now open to name the next person responsible for educating over a million of our kids.