Visible crew/equipment: When Kurt is yelling at Dexter for whispering something, you can see a stage light in the reflection of the trash can as he walks behind him.
Visible crew/equipment: In the end of the movie when Kurt is arrested, the camera and a crew member wearing sunglasses are reflected in the side of the police car.
Visible crew/equipment: When Dexter is driving with his friend in his mom's car you can see a police officer stopping traffic for the shoot, when they make a right turn on to the street where the car accident occurs.
Visible crew/equipment: When the burger from Mondo Burger's roof falls and lands into Mr. Wheat's car and ruins it completely, crane wires underneath the car on the side are visible.
Answer: We don't know that he doesn't. He could simply go to a different school where the school year ends slightly earlier. It's also possible that he's already graduated or dropped out.
LorgSkyegon