Answer:
The sit-in movements used by African American students in the 1960s were a form of nonviolent protest against racial segregation. The students would sit at segregated lunch counters in restaurants and other public places, refusing to leave until they were served.
The sit-in movement began in Greensboro, North Carolina in 1960, when four African American students from North Carolina Agricultural and Technical State University sat down at a segregated lunch counter in a Woolworth's store. The sit-in quickly spread to other cities across the United States, as more and more students joined the protest.
The sit-ins were a powerful form of protest because they were nonviolent and peaceful. They drew attention to the injustice of racial segregation, and put pressure on businesses and government officials to change their policies. The sit-ins also helped to galvanize the Civil Rights Movement, and inspired other forms of nonviolent protest, such as the Freedom Rides and the March on Washington.
The effects of the sit-in movements were significant. They helped to desegregate many public places, and paved the way for other civil rights victories, such as the Civil Rights Act of 1964 and the Voting Rights Act of 1965. The sit-ins also inspired a new generation of activists, who used nonviolent protest to fight for social justice around the world.