WASHINGTON — A Washington elementary school staff member told third-graders in library class to reenact scenes from the Holocaust, directing them to dig their classmates’ mass graves and simulate shooting the victims, according to an email from the school’s principal. The instructor was placed on leave Friday. The Watkins Elementary School staff member allegedly assigned specific roles to students. She cast one student as Adolf Hitler, according to an email from Principal M. Scott Berkowitz to the third-graders’ parents. He did not name the staff member. That student is Jewish, according to the parent of a student who was asked...