Something they have in common?
Black will need a waiver to do the job, just as Klein has, because she is not qualified under New York state law. (Klein's previous experience was as a lawyer in, among other places, the U.S. Department of Justice.) Mayor Bloomberg (to whom the state legislature persists in handling control of the schools back) sees no need for education experience of any sort in running one of the largest school districts in the country.
Klein's going to work for Rupert Murdock's News Corp.
UPDATE (11/16): Turns out she does have a bit of school experience: when she was at Coke, she led the fight to keep soda in schools:
The company unleashed a flurry of lobbyists, donations and advertising to fight the efforts, prompting local officials to describe it as “bullying” and “unconscionable.” Even as other large food manufacturers embraced the public-health measures, Coca-Cola dug in its heels, rewarding schools that kept selling its products and threatening those that would not, officials said.Well worth reading the whole article.