Revealing mistake: Doyle is making a chair in woodwork, but as he is fitting one of the legs he hits the chair with a hammer too hard and splits the wood then gets a telling off from Mr Hopwood, the wood was already split before Doyle hit it.
Continuity mistake: In the canteen Doyle is next to Tucker, and puts his plate on the table before sitting down. The angle changes and Doyle puts his plate down a second time.
Visible crew/equipment: Boom mike shadows can be seen in this episode on Andrew's face as the class comes in for registration and on the walls of the woodwork room storeroom when Tucker and Doyle are in there.