4. Q: What are the classifications of American private high schools (boarding schools)? A. All boarding schools: There are only more than 20 such schools in the United States, and all students must live on campus. B. Boarding day school: Students can choose to live on campus or go to work, which means some students live on campus and some day students live near the school. (This kind of school can be subdivided into: 5-day boarding school 5-day boarding school: students live on campus from Sunday to Thursday and can choose to go home on weekends; 7-day boarding school: students can choose to live on campus or commute. Military school: mostly for boys. The school follows the military training education system, and students must wear school uniforms and conduct military training drills at school.