Columbia University teachers worn start regalia and other fans demonstration versus the university’s current actions versus a pro-Palestinian trainees’ camp on school, on the actions of Low Memorial Library in New York Photograph: Sarah Yenesel/EPA The trainee camp on Columbia University’s school, which is opposing versus the university’s ties with Israel Photograph: Sarah Yenesel/EPA Pro-Palestinian protesters march outside Columbia University in New York Photograph: Kena Betancur/AFP/Getty Images Pro-Israel demonstrators shout ’embarassment’ in assistance of a Columbia University assistant teacher, Shai Davidai, who was rejected access to the primary school to avoid him from going to the yard inhabited by pro-Palestine trainee demonstrators Photograph: Stefan Jeremiah/AP Barnard teachers go out of class in assistance of trainees suspended for opposing for Palestine at Columbia University Photograph: Spencer Platt/Getty Images Pro-Palestine demonstrators collect inside and outside the locked gates of the Columbia University school in New York Photograph: Melissa Bender/NurPhoto/Rex/ Shutterstock Pro-Palestine and anti-Hamas sticker labels are published around the school of Columbia University Photograph: Laura Brett/Zuma Press/Rex/Shutterstock Students and professor on the school of Columbia University Photograph: Lev Radin/Zuma Press/Rex/Shutterstock Pro-Palestinian protesters established a camping tent encampment in front of Sproul Hall on the UC Berkeley school in California Photograph: Justin Sullivan/Getty Images Pro-Palestinian protesters show on the UC Berkeley school Photograph: Justin Sullivan/Getty Images Yale trainees construct a cardboard prop throughout a demonstration on a quad in front of the Sterling Memorial Library Photograph: Stan Godlewski/Zuma Press/Rex/Shutterstock Students of New York University hold a Gaza uniformity encampment outside the NYU Stern School of Business Photograph: Jesus King/Rex/Shutterstock Pro-Palestinian trainees and professors of New York University influenced by Columbia University inhabit a plaza on school and state it a Gaza uniformity encampment Photograph: Andrew Lichtenstein/Corbis/Getty Images Pro-Palestine protesters at New York University Photograph: Jimin Kim/SOPA Images/Rex/Shutterstock Protesters carry out prayers as cops step in and detain more than 100 trainees at New York University Photograph: Anadolu/Getty Images Police jail trainees at New York University who continue their presentation on school in uniformity with the trainees at Columbia University and to oppose Israel’s attacks on Gaza Photograph: Anadolu/Getty Images Workers construct barriers at NYU’s Stern School of Business after trainees and professors were detained after establishing a Gaza uniformity encampment at Gould Plaza Photograph: Jesus King/Rex/Shutterstock A pro-Israel protester waves an Israeli flag throughout the street from a pro-Palestine presentation at New York University Photograph: Jimin Kim/SOPA Images/Rex/Shutterstock A pro-Palestine demonstrator at a demonstration encampment on the Columbia University school in New York Photograph: John Minchillo/AP Protesters from Massachusetts Institute of Technology, Harvard and others at a demonstration encampment on MIT’s Kresge Lawn Photograph: Scott Eisen/Getty Images MIT trainees at a camping tent city on school Photograph: Cj Gunther/EPA Students at Emerson College inhabit a camping tent city surrounding to the college school as they oppose versus Emerson’s ties to Israel Photograph: Cj Gunther/EPA Pro-Palestinian trainees demonstration in Kogan Plaza at George Washington University Photograph: Aaron Schwartz/Zuma Press/Rex/Shutterstock Student and neighborhood members carry out a dabke, a standard Palestinian dance, in assistance of pro-Palestinian protesters locked inside Siemens Hall at Cal Poly Humboldt in Arcata, California Photograph: Paul Kitagaki Jr/Zuma Press/Rex/Shutterstock