essentially the school board is no longer democratically elected and is instead run by a hand-picked board of managers:

HISD superintendent Millard House II, who had been on the job for two years, was replaced by Mike Miles, a former Dallas ISD superintendent and the founder of Third Future Schools, a network of public charter schools. The elected trustees were replaced by a board of managers picked by the TEA. While racially diverse, the board members mostly live in affluent areas of Houston west of downtown, far from the schools in northeast Houston targeted by Miles’s reforms.

and the new board of managers and superintendent have a whole sweeping package of stuff they want to do:

A total of 29 elementary, middle, and high schools—all serving low-income, predominantly minority student populations—will be reorganized according to Miles’s “New Education System,” a package of reforms he implemented at Dallas ISD and his Third Future schools. In coming years, Miles plans to expand this system to more campuses. [the New Education System implements] [...] higher teacher pay ($85,000 starting salaries, compared to around $61,500 for the coming school year), bonuses for the best teachers, a curriculum focused on reading and math, and a strict disciplinary regime enforced by cameras in every classroom. Unruly students will be removed from class and placed in a separate room, where they can follow along by video. Miles has said that librarians will likely be eliminated—because, in his view, their job consists only of “checking out books,” as he told the Houston Chronicle editorial board. Magnet programs may be scaled back, although schools will retain extracurricular activities, including sports. Miles did not respond to an interview request for this story. To implement these reforms, the superintendent is requiring every employee in the 29 schools, from the janitor to the principal, to reapply for their job. (Employees who aren’t rehired can move elsewhere in HISD.)