Continuity mistake: When Max is phoning the Chief to let him know the mission's been accomplished, he takes the oars out of the oarlocks before opening his shoephone. The oars change from being out of the oarlocks in the closeups to still being in the water in the long shots for the rest of the episode.
Continuity mistake: When Max is walking around the school grounds he walks up to man breaking a piece of wood. The man breaks a piece of wood and then bends down to pick up a new piece, leaving one on the ground. The shot changes and Max is standing there talking and the man breaks the piece of wood and bends down to pick up another one (which should be the last piece). However there is another piece left on the ground.