This article knows where the bodies are buried:
Not long after the mayoral takeover took place, the Chicago Public Education Fund was created. The fund is a public-private enterprise bankrolled in part by Joyce. Its precursor was the Chicago Annenberg Challenge, which launched in 1995 and morphed into its current form in 1999 via $2 million in seed money.
Obama, well before his rise to national fame, served as the chair of the board of directors of the Chicago Annenberg Challenge. He also sat on the board of the Joyce Foundation.
This assault on public education has been going on for many years. I don't know if it can ever be reversed.