Teachers are told to report there instead of their classrooms. No reason is usually given. When they arrive, they find they've been put on some kind of probationary status, and they must report every day until the matter is cleared up. They call it the Rubber Room. Average length of stay? Months, sometimes years.
You can listen to a podcast of the show here. (Look for Full Episode on the left of the page. The report begins at 7:25)
There's also a movie called The Rubber Room by Five Boroughs Productions. Go here to watch the trailer.