Visible crew/equipment: In her office when Mrs Mclusky is telling Mrs Woods that Derek is not to come to school for the next two weeks you can see a boom mike shadow on the wall behind Mrs Woods.
Continuity mistake: At the start of the fight, a boy attacks Gripper with a chair. He is holding it upside down with the backrest against Gripper, who is holding the chair's legs and pushing the boy with it. The angle changes and the chair is the right way up, with Gripper pushing the other boy with it, holding onto the chair's legs. Another angle change and Gripper is holding the chair seat and pushing the boy with the backrest.
Plot hole: Gripper, Woody, and Randir are suspended from school for two weeks after their involvement in the fight. Woody and Randir appear in the next episode, but Gripper doesn't return until episode 14.
