When Lily loses her tie she is encouraged unwittingly to 'steal' a tie by an older pupil whom she helped out earlier.

When Lily loses her library books, she invents a fictional classmate to take the blame and soon the lie escalates way out of control.

Lily is troubled because she's not sure whether she and Matt Furnish are actually going out or not. Jas volunteers to help.

Martha is worried Mr Malone is not up to teaching PSHE classes thoroughly enough and that she will fail the subject.

Jas has fallen in love with the school locusts and is tenderly looking after them.

Lily decides she must kiss Matt to prove they really are boyfriend and girlfriend. Meanwhile, Martha and Ollie research germs.

Head of school council Jade comes up with the idea of a graffiti wall at school, with pupils invited to express themselves on it.

Dressed up as boys for drama, the girls get mistaken for boys. Mrs Griggs is obsessed by a phone app game called Sweetie Swap.

When Mrs Hampton volunteers to help out at the upcoming food festival at school, Lily panics that her mother is going to embarrass her.

Martha and Lily desperately compete to avoid being top of the class as the reward event clashes with their plans.

Traditionally, Martha and Jas have had a joint birthday party. When Jas and her dad suggest 'shaking it up' a bit this year, it leads to some arguments.

When a photo of Martha in the school prospectus is photoshopped, she is outraged. Mrs Griggs's latest obsession is underwater karate.

Jas decides to follow in her dad's footsteps and try out for the junior hockey team. Mr Salford was a legendary goalie in his time at the school.

Mrs Griggs decides that a social skills class could be beneficial for certain pupils - including Martha, Rufus, Cassie and Maxwell.

Martha becomes troubled when she is the only person unable to cry in an emotional assembly. Meanwhile, Matt learns to play the guitar.

When she discovers her mum's school grades dropped the year she got her first boyfriend, Lily tries to avoid the same thing happening to her.

Lily complains Rob is too 'boy' - she finds his boisterousness and burping gross and decides to give him a dose of his own medicine.

A business studies competition is announced at school, and both Lily and Martha desperately want to be project manager.

Lily decides her bedroom is babyish and needs a makeover to reflect the fact she is now a sophisticated teen.

Jas is asked to be a bridesmaid but is worried about being too clumsy. Meanwhile, Mr Salford has to make a presentation.

Jas transforms the art room into a spaceship to conduct an experiment into how teenage boys deal with being cooped up together.

Martha starts acting oddly, getting emotional and over-reacting to things. She's horrified to realise that her hormones are kicking in.

Martha and Ollie throw Cassie and Maxwell off the maths team, desperate not to be outshone as they were last year.

Lily tells Cassie and Maxwell about Rob's inability to get angry and they resort to hypnosis to cure him.

Lily worries that Jas is feeling left out. With Ollie and Martha practically a couple as well as her and Rob, she decides Jas needs a boyfriend.