Other mistake: When Spinelli's real parents arrive at Parents' Night, the shot is flipped: the potted plant and poster are on the opposite sides, the letter on the poster is mirrored, the door opens the opposite way, and Spinelli's parents are running in the wrong direction. (00:08:26)
Continuity mistake: At Parents' Night at the school, the doorknob is on the left side of the door to Miss Grotke's classroom. Then, when Spinelli and her "parents" go out of the classroom, the doorknob is on the opposite side, then goes back to the left side in the next shot. (00:07:34)
Schoolworld - S4-E21
Continuity mistake: The door to Miss Grotke's classroom opens inward throughout the episode. However, when SAL mimics Principal Prickly and tells all the teachers to report to his office, Miss Grotke leaves the classroom, and the door now opens outward. Then, when the kids look outside the classroom, the door has completely vanished.
