A Function (2011) is a Horror film that follows in a class room, a girl is sitting on the desk, solving a math quiz. If she cannot solve it in time, a horrible thing is likely to happen. A Function is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.3 out of 10 from 9 votes. Fans of horror movies may also want to explore similar titles below.