A principal who leads a prayer at a graduation violates the First Amendment’s

a governess was mean to her.

explanation:

an era of negotiation.

is that an answer to your question?

b. they tried to evict the squatters from the area.

so sorry if wrong

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.