Continuity mistake: Linderman supposedly pulls his bike out of the water before his fight with Mike. Neither he or his bike is the least bit wet.
Continuity mistake: When Clifford picks up his schedule on the first day, the lady tells Cliff where room 327 is. He then confronts a teacher in a brown polka dot shirt in the hall and asks her where 235 is. He then proceeds to enter home room 327.
Continuity mistake: When Clifford is running down the hallway from Moody and his gang, Moody closes in on him by almost 40 feet. In the following shot, outside the auditorium, Clifford is a greater distance from the gang, sighing relief at the apparent getaway. Unless he suddenly picked up speed rounding some hallway corner, the time distance is impossible.