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.
Other mistake: Ed's golf ball didn't hit anything to make it fly back and hit Roxanne.
Continuity mistake: When Ed is fixing the Good Shake machine, a stack of cups are straight but in the last shot when Ed is spinning around, the stack of cups are flipped over.
Continuity mistake: When Dexter is working at Mondo Burger before getting fired, slices of tomato disappear and reappear between shots while he is making his first burger with all that mess.
Continuity mistake: When Ed flies out of the window to escape Demented Hills, his hat is gone. But in the next shot when he lands on Dexter on the ground, his hat is back.
Continuity mistake: In the beginning when a talking burger comes out of the bag, sauce packs in the tray at the bottom right change between shots.
Continuity mistake: When Ed is talking to an upset customer, there are 2 papers hung behind Ed clipped. When Ed asks Fizz if a meat patty is something or nothing, the papers are gone.
Continuity mistake: When Ed starts driving the Burgermobile vehicle to train Dexter for deliveries, the cup moves down to the ground when the vehicle is out of the garage but in the next shot, the cup is back straight up.
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.
Continuity mistake: When Dexter and Ed are having lunch together, the straw in Dexter's cup goes from straight up to bent down between shots.
Continuity mistake: When Ed is looking at the contract Dexter gave him, the fan behind Dexter is spinning around in slow speed in the shot where Ed says "Mm-hmm, mm-hmmm." But in the next shot of Dexter, the fan is spinning around much faster.
Continuity mistake: When Ed stops the old lady from eating the Good Burger's poisoned sauce, he is on the lady on the ground, tackling her. In the next shot when the manager gets Ed off the lady, a set of dentures appears.
Continuity mistake: Dexter is driving the ice cream truck back to Good Burger. When they all arrive the truck is parked in the driveway, but at the very end of the film when everyone is cheering Dexter and Ed for saving Good Burger, look through the window and the truck is gone.
Revealing mistake: Right after Dexter begins driving the ice cream truck, a stuntman has replaced him.
Revealing mistake: At the beginning when Ed accidentally switches between the baby and the basketball, look closely in the background when Ed realises that he is holding a basketball, and the baby getting thrown through the hoop in the background is a doll.
Other mistake: Heather the psychopathy lady from Demented Hills who talks to Ed, is at Good Burger in the end of the film. She was supposed to be staying at Demented Hills.
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