CJ viene convinta dal fratello che l'esperienza del liceo è orribile e che perderà i suoi migliori amici, Fenwick e Crispo. Questo pensiero la terrorizza! CJ organizza un'ultima avventura con i suoi migliori amici, Fenwick e Crispo, terrorizzata dall'idea che il liceo possa separarli.

CJ, Fenwick e Crispo decidono di affrontare alcune delle loro più grandi paure. Mentre ciascuno cerca di superare ciò che lo spaventa di più, CJ tenta finalmente di trovare il coraggio necessario per parlare con il ragazzo per cui ha una cotta.

CJ convince Fenwick e Crispo a trascorrere un'intera giornata accettando qualsiasi proposta venga fatta loro. Quella che inizialmente sembra un'ottima occasione per vivere nuove esperienze si complica rapidamente quando i tre scoprono che dire sempre di sì può avere conseguenze impreviste.

CJ propone agli amici una nuova missione: diventare delle “fate madrine” e realizzare altruisticamente i desideri delle persone che li circondano. Fenwick e Crispo inizialmente non sono entusiasti dell'idea, ma tutti e tre scoprono presto che rendere felici gli altri può essere più complicato del previsto.

Durante un pigiama party organizzato a scuola, CJ, Fenwick e Crispo decidono di rimanere svegli per tutta la notte fino a vedere sorgere il sole. Portare a termine la missione, però, si rivela molto più difficile del previsto, soprattutto a causa dell'intervento della preside.

A sleepover fund-raiser is held at school, and CJ and her pals want to stay awake for the event, but it's no easy task.

CJ longs for a pet, but her mom is unsure she's ready, so she makes CJ look after a flour baby to prove she's responsible.

CJ and her pals experiment with their wardrobes and learn about the effects clothes can have.

CJ è sicura che dentro ognuno di noi si nasconda un superpotere ed è determinata a trovare il suo e quello dei suoi amici.

Crispo lacks funds for a concert ticket, so his pals scheme to get him one without him knowing they paid for it.

CJ and the boys decide to expand their group, but making new friends throws each of them into unexpected situations.

The group decides to enter the science fair, but CJ cannot figure out what she wants to do and starts losing her spirit; however, Ronbie raises her spirits back up with a pep talk. Meanwhile, Fenwick builds a robot that is beaten by Mindy's better robot. Crispo tries multiple things to impress one of the judges, but repeatedly fails. Eventually, CJ figures out that she can enter her list of 100 things to do before high school because of the science of whether or not things on the list prepare someone for high school and Fenwick builds a robot that highly surpasses Mindy's, but it goes haywire and wrecks everyone's science fair projects, except Crispo's, whose science fair project ended up being himself because of what his body can do.

When Crispo joins the Save the Baboons club, which is ran by Mindy and Blake, CJ and Fenwick, who were not allowed to join, try to find their own clubs. Fenwick joins the Super Genius club and CJ joins the Club club, which is boring. CJ and the other club members attempt to make it cooler, but it gets taken over by Mindy and Blake's club, so CJ tries one more time in a bigger room. When Crispo discovers that the money donations for the Save the Baboons club is going toward the club's expenses rather than saving the baboons, he leaves and join CJ's Club Awesome club, which becomes a huge success. However, it becomes too much of a success after Mindy's not able to go in, despite everyone being able to join, and CJ, Fenwick, and Crispo not even being allowed to go back in due to the club reaching capacity.

Due to a bad childhood experience, Principal Hader cancels the Halloween carnival. CJ, Fenwick, and Crispo make it their thing to figure out why Principal Hader hates Halloween and fix it. Meanwhile, Crispo is made fun of for wearing what others perceive as a costume for little children. He then changes to a more dark costume to be cool, but later realizes that he should not change simply because somebody doesn't like a particular feature about him.

CJ, Fenwick, and Crispo are all sick; CJ and Fenwick are both home while Crispo wants to know what it's like to have a sick day, but his parents don't ever allow him to stay home, no matter how sick he is. Meanwhile, to keep his perfect attendance record, Fenwick has Crispo walk around with Fenwick on an iPad. Later, Fenwick gives Crispo the idea to get on a bike and go over to CJ's house to make the best of his sick day, but when Crispo gets over there, CJ's not there because she came back to school since she was feeling a lot better thanks to some disgusting green liquid medicine her parents forced her to take earlier.

CJ challenges her friends to sit at another lunch table during lunchtime and see how events occur differently.

CJ and her friends discover the challenges of taking care of themselves when they find that they are home alone for the night

CJ and the boys decide to make their voices heard during the 7th grade elections; a friendly competition turns negative

When a simple lie morphs into an out of control event, CJ and the boys discover the power of words and the messy business surrounding lies, truths and the consequences of telling both.

The children are ready to redeem their rewards for a school achievement trip to the water park, but their "pootybucks" go missing.

CJ, Fen and Crispo try to find their own unique ways of creating lasting memories of their time at Pootatuck.

The friends plan to meet their idols, but when their carefully laid plans begin to unravel they realize the importance of patience.

The gang becomes inspired by the fact that it takes 10,000 hours to master something, so they decide to master their own things.

Crispo attempts to overcome his fear of asking for help in class; CJ volunteers to escort fifth grade students through the school; Fenwick tries to become the high five king of middle school.

After Ronbie's girlfriend dumps him, CJ and the boys decide to take the initiative and get their hearts broken.