CHICAGO—For the new school year beginning in the fall, more Chicago public high schools are opting to remove on-campus police officers, a movement that gained momentum citywide last summer after the death of George Floyd. Among about thirty high schools that retain officers, eight out of ten are in the most violent neighborhoods on the South and West Side, and most of their student bodies are predominantly African American. Often at the pleading of parents who live in these neighborhoods, the local school councils voted to keep one or two police officers on campus, overcoming strong and emotional opposition from teachers and activists, who argue on-campus officers will traumatize black youths and that students will be better served if the money is spent on social programs instead. At George Westinghouse College Prep, a public high school in the Garfield Park neighborhood on the West Side, a recent schoolwide survey shows …