If you headed into the West 4th St. Subway Station on March 9, 2014, you may have seen a group of people writing on cardboard, taping it to the walls, and seemingly holding a small class in the underground space. Those were some of the members of Free University NYC, a radical educational project started during May 2012 as a form of educational strike. They hold classes in public spaces like parks and subway stations, and are entirely free.