Amy Donofrio stands in front of Robert E. Lee High School in Jacksonville, Fla. She was suspended from teaching duties after she refused to take down a Black Lives Matter flag from outside her classroom. Robert E. Lee High School in Jacksonville, Fla., was segregated — whites only — until the 1971-1972 school year. Its school colors are blue and gray, the colors of the Confederacy, and its sports teams are called the Generals.