1968 New York City teachers' strike

The 1968 New York City teachers' strike was a months-long confrontation between the new community-controlled school board in the largely black Ocean Hill–Brownsville neighborhoods of Brooklyn and New York City's United Federation of Teachers. It began with a one-day walkout in the Ocean Hill–Brownsville school district in May 1968, and escalated to a citywide strike in September of that year, shutting down the public schools for a total of 36 days and increasing racial tensions between Black and Jewish Americans.

Source: Wikipedia — 1968 New York City teachers' strike (CC BY-SA 4.0)