Wednesday was another day of protests about racism and bias on campus, as a coordinated national effort sparked demonstrations at at least 20 colleges.

Across the country, students spread their message with the hashtag #studentblackout. The Black Liberation Collective, a new coalition of student groups organized the effort.

Students have been demanding for a long time that administrators improve race relations on campus and take stronger steps after incidents such as the discovery of anti-gay or anti-Semitic graffiti on campus. But the stunning success of the demonstrations at the University of Missouri — where the chancellor and university system president were forced out, and a onetime civil rights lawyer took over as interim university system president and began making changes immediately — galvanized many student activists.

At Yale, the university president responded to protesters’ demands Tuesday evening.

At Princeton, students occupied the president’s office, refusing to leave until he signed their list of demands.

At Tufts, the Tufts Daily followed as students marched:

A growing list of demands at various campuses was tracked online, with more than 30 colleges represented Wednesday evening.

At some schools, administrators were confronted by protesters.

At others, they joined them.

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