Dude. . .Where's My Classroom?

One year, for April Fool's Day, my ever-so-well-behaved seniors told me that the principal had an envelop for me. So, I headed down the hall after him. When I came back to my room, everything was gone! The desks, my desk, my computer- everything- and all the kids were sitting quietly on the floor reading their books as if it were an ordinary day. They just looked up at me sweetly like nothing was wrong. They wouldn't even tell me where everything was, but eventually we got everything back, but they were pretty proud of themselves. I wasn't mad because it was harmless and nobody got hurt and they felt like they really pulled a fast one.