By Rehema Ellis, Education Correspondent, NBC NewsANNAPOLIS, Md. -- When Principal Donald Lilley was hired nine years ago to improve Annapolis High School, he discovered what appeared to be two schools under one roof.“My African-American ninth grade males … I’d say 73 percent, had less than a 2.0 grade point average,” he said.The white students, however, were taking Advanced Placement classes and ...