Check out this awesome education blog by Nicole Johnson in the School of Education:
Prior to the storm, Orleans Parish School Board, (the former entity of public schools in NOLA), was largely populated by public schools and union teachers. After the storm, the Recovery School District was enacted to jumpstart the system, and various education management organizations took over the schools. Now, all of NOLA schools are charters. You will find that the majority of teachers there are young, white, idealistic, recent college graduates, whereas, before the storm, many were unionized Black, experienced teachers.