Union-sponsored event outside Lea Elementary also honored District teachers who are quitting over five years of frozen wages
Plans call for three school closings a year starting in 2019.
Teachers at a second school, Taylor Elementary, say they will also participate. The District issued a statement saying: "All students and teachers are expected to be in school throughout the school day."
A sign targeting city and school leaders will go up Feb. 27 on I-95.
A Philly teacher is raising money for a billboard to highlight the District's stalemate over a teachers' contract.