Mr Christopher's been given a promotion, Mrs Winstone's calling in her library loans, Mr Capp's asleep in the playground and art teacher Mr Rhomb is nowhere to be seen... just an average Tuesday at Dockbridge High!

There's an outbreak of nits at Dockbridge High, and there's only one person who can help... Some call her the Exterminator, some call her the Nitbuster, others just call her the Nit Nurse. But can she save the school from a fate worse than nits?

With the sudden departure of Mr Barker, there's a vacancy for a new head teacher at Dockbridge High and Mr Potter has his eye on his dream job. Unfortunately someone else does too...