This happened in August, but it's making the rounds now. High school students in Collierville, Tennessee tricked their teacher into thinking they broke the classroom TV. He doesn't know that they airplayed the broken screen using Apple TV.
It starts with the teacher out of the room as a student throws a random chair to make noise. When the teacher comes in and sees the screen, he goes nuts. He thinks he may lose his job over it. Some people think it seems staged though.