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.

Lily is delighted when Rob buys her a present for the first time - only it's a horrible bug-shaped brooch!

When Lily and Martha get the flu, Maxwell and Cassie are roped in to replace them in the school's general knowledge quiz.

Martha is offered a place at Greatacre, the boarding school her mother once went to, but Ollie and Alfie can't cope with the idea of her leaving.

Ollie, Rob, Jas and Sid enter Battle of the Bands with tuneless Mr Malone. Lily wants her mum's boyfriend Ken to like her.

Lily decides to tell Rob she loves him, but first she's going to build him a football stadium out of lollipop sticks.

On the day Martha asks Lily for the 7p she owes her, Lily inherits a lot of money. She becomes determined to prove Martha is petty.

Lily's gut instinct tells her that fellow pupil Carla fancies Rob. Rob denies this but Lily sets out to prove her gut instinct is correct.

Snobby Ollie mocks Mr Malone's ancestry, inspiring the gang to teach him a lesson. Then Ollie discovers he's actually related to Mr Malone.

Rob enters a modelling competition and Lily is determined he will win using 'the look'. Martha practises dating.

Lily and Jas fake a falling-out to get Rob and Sid to stop arguing, while Ollie and Martha train Mr Malone to be a better teacher.

Lily plans a perfect date night to celebrate her anniversary with Rob, but her mum and Ken might ruin everything.

Lily, Martha and Ollie become prefects and the power goes to their heads.

It's Halloween and Jas goes to extreme lengths to cure Lily's many fears before her scary party, while Ollie falls in love with new girl Em.

Martha and Ollie are confident they can win the McSherman Science Prize, but they have one tricky formula to work out.

The girls follow an app promising future success, but can they resist their weaknesses?

Lily is delighted to be waitressing at Mugshotsz café, until Jas joins her. Martha is stunned to discover Ollie has a girlfriend, and Rob is upset Sid might leave Cranmede School.

Jas's lie to Lily snowballs into a charity sumo wrestling bake-off event! Martha and Ollie compete to win awards by teaching tech to pensioners, ex-punk Jonny and chatty Mazel.

Head boy Hunter has a crush. Lily, believing it's her, plots to let him down without smashing his heart to bits. Martha and Kat compete to have a statue erected of an Amazing Woman.

Lily lies to prove she is a good actor, Ollie researches to prove he is not a defective detective and Martha tries to prove to Jas that Sid has another girlfriend and telepathy doesn't exist.

For his PE module, Rob offers free personal training sessions, but things go awry when Mr Malone agrees to be his student. Meanwhile, Lily and Jas ask the universe for help.

Lily over-organises the best Valentine’s Day ever with Rob, Martha helps Ollie plan the perfect evening with Kat, Jas invents random gifts for Sid and Mr Malone needs a date.

For Mugshotsz Open Mic night, Martha and Mr Malone join forces in a bid to beat competitors Ollie, Kat and Hunter. Jas and her little 'friends' threaten Lily's hopes for big tips.

Ollie manages Mugshotsz for the day, but the power goes to his head. Meanwhile, Lily and Jas go on strike and Mr Malone and Lou are trapped.

Ollie and Rufus beat an unbeatable video game and celebrity vlogger Jam9T7 wants to know how. Lily and Jas’s mission to expose enviro-crimes leads to a surprising revelation.

Ollie has agreed to host a science radio show with Martha, but he hasn’t got round to telling Kat. Lily and Rob search for a song for them to not just love, but love love.

Selecting the right work experience gets bumpy. Lily's dream of being an actress turns into a nightmare, Ollie regrets his career choice, and Martha's indecision leads to a crisis.

Lily gets addicted to a virtual reality game, Ollie is forced to express his feelings and Martha wins a competition she didn't enter.

Can Lily have a perfect Christmas when Ollie is allergic to Christmas, Sid hates Christmas, Rob thinks Lily's presents are terrible, Jas is upset with Sid and Martha is leaving?