sweep room
n.— «The school also uses what’s called a “sweep room,” where students spend the hour if they’re found wandering the halls after the period bell has rung.» —“Contrary to rumors, it was a normal day at high school” by Jason Miller News-Dispatch (Michigan City, Indiana) Sept. 15, 2006. (source: Double-Tongued Dictionary)
Further reading
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
In 1971, when a new public library opened in Troy, Michigan, famous authors and artists were invited to write letters to the city’s youngest readers, extolling the many benefits of libraries. One of the loveliest was from E.B. White, author of...