The project of free market education reform is so widespread in America that many cities and states insist on claiming the title of “ground zero” of education privatization. Whether or not Oakland can claim that unfortunate title, it’s clear that the privatizers have made huge headway in the city: Oakland is now the city in California with the highest percentage of students in privately run charters, and the city’s school district is aiming to deepen its downsizing project by closing twenty-four of the city’s eighty-seven public schools.

Which makes the teachers’ strike that kicked off today in Oakland all the more crucial.

Stopping and reversing the privatization offensive will take mass collective action. It will also require understanding the billionaires and their political proxies who are behind these attacks on public education. Here’s a crash course on the powerful enemies of Oakland’s public schools.