It’s Halloween at Abbott Elementary! When a student steals a bag of candy meant to be given out to the kids at the end of the day and starts distributing it during school hours, the teachers band together to find the culprit. Meanwhile, Janine is invited to a Halloween party by an old friend and starts to reconsider her personal life.

The competition heats up between Melissa and Janine as their classrooms go head-to-head in a read-a-thon sponsored by a local pizza shop. Both teachers encourage their students to hit the books hard but face some unexpected obstacles on their path to pizza glory. Meanwhile, Jacob and Gregory join forces and attempt to get their student-podcasting club off the ground.

Barbara organizes a candy-selling fundraiser to raise money for a school field trip to the science museum. When sales don’t go as planned, Ava steps in to teach the students new, unconventional selling tactics. Elsewhere, Mr. Johnson and Jacob butt heads about how to take care of a cat found in the janitor’s closet.

It’s the last day of school! Ahead of summer vacation, Janine throws the perfect end-of-year party for her colleagues and friends, taking all their interests into consideration.

When the eighth-grade science class participates in an egg drop activity, Janine insists her second-grade class joins in. Even when the science teacher and Gregory tell her that her students aren’t ready for physics lessons, Janine is determined to prove them wrong. Then, when Barbara is shocked at the clothing one of her student’s parents wears, she learns to not judge someone solely based on their appearance.

Janine is out sick for the day; but with the substitute teacher shortage, Ava grows desperate and must step in herself to help out. She starts the day in an unconventional fashion, disrupting the students’ typical routine as well as neighboring classrooms. Meanwhile, Barbara and Melissa revel in the quieter-than-normal teacher’s lounge.

After Jacob reveals a detail about his personal life, Janine realizes she doesn't know the other teachers as well as she thought; Gregory's stern teaching approach is causing his whole class to underperform.

The teachers are back for development week, a time to prepare for the upcoming year. Janine is determined to start the year off right and leave her problems at home. Ava runs a side hustle out of the school parking lot.

While on Abbott's annual zoo field trip, Tariq reveals that he has been offered a job in New York; Janine struggles with a big choice; Barbara starts questioning her future after finding out her favorite tuatara has been retired because of old age.

During a day of touchdowns and missed plays, the Abbott Elementary faculty find themselves learning lessons in teamwork. Two of Janine’s students aren’t getting along in class, leading her to seek advice from her colleagues on how to help repair their friendship. Meanwhile, Melissa and Ava plot to bring down Mr. Johnson in fantasy football.

When a new computer program is introduced at Abbott, Janine is excited to finally help Barbara with something. Barbara is reluctant to accept change and finds herself in a tricky situation. Melissa surprises Jacob.

After a negative teacher review, Janine gets a confidence boost when a student gets transferred from Melissa's class into hers. Jacob tries to forge a friendship with an uninterested Gregory.

Janine is thrilled when Ava asks to help her teach the after-school step class, but the two don’t see eye to eye on how to run the program. Later, when Barbara, Melissa and Jacob plan an “eat-off” to decide who makes the best pizza in Philadelphia, Gregory is forced to reveal a secret

It’s Open House night at Abbott Elementary, and while Janine prepares to meet her struggling student’s mother, the rest of the faculty uses the time to relax. Gregory is taken aback when he learns how Ava got the principal job, and later, Barbara’s daughter’s visit creates a commotion in more ways than one when

With the school board threatening to pull their funds, Janine and Gregory decide to help Ava out with her presentation in front of the Superintendent. However, their plan is derailed when a curveball is thrown at Ava. Meanwhile, Barbara offends Melissa when she doesn’t agree with her blackmail idea.

Janine is thrilled to help introduce a new beverage to the cafeteria, but it ends up causing unexpected consequences for the students, teachers and school plumbing system. Elsewhere, Melissa clashes with her new aide, Ashley, who brings more disruption than help to the classroom.

The teachers are appalled after seeing a commercial in support of charter schools criticizing Abbott Elementary. When students begin to transfer schools, Jacob, Ava and Melissa invite the leader of the charter school organization to Abbott and ask him to take down the ad. Elsewhere, Janine and Gregory talk about Janine’s relationship with Tariq .

On the last day of school before winter break, Janine is convinced by her friend to go to a popular hookah club where she runs into unexpected colleagues. Elsewhere, Jacob crashes Barbara and Melissa's traditional holiday dinner and in the process begins to learn the true meaning of Christmas.

After a student is caught smoking, the Abbott staff come together to revamp the outdated drug policy. Meanwhile, Janine tries to prep the new substitute teacher for her class but finds it challenging to give up her former role.

Jacob manages to pull off a schoolwide field trip to the park; however, when Abbott must share the playground, the fun and games turn competitive. Elsewhere, Mr. Johnson enjoys having an empty school to himself.

When the students start participating in a new online trend that causes disruption to the school, the teachers band together to put an end to it. Meanwhile, Mr. Johnson provides comforting life advice to Gregory; and later, the teachers finally meet Jacob’s boyfriend, Zach, who joins in to help stop the students “desking.”

After Janine gets a look at the new charter school down the street, she becomes determined to fix up Abbott and make it just as good. As Gregory goes out of his way to avoid Barbara due to an awkward situation with his personal life, and Ava takes to the school library to host a “Shark Tank”-style pitch to decide what to do with the rest of the funds from the grant.

After Gregory sends a disruptive student to the principal’s office, he’s dismayed to find out the kids actually enjoy spending the supposed disciplinary time with Ava. Meanwhile, Melissa invites Janine over to her house to teach her how to cook, but Janine becomes determined to reunite Melissa with her estranged sister

It’s Teacher Appreciation Day. When the district gives Abbott two courtside tickets to a 76ers game, the teachers must decide who deserves them. Later, Janine invites the teachers to her house for game night and her sister, Ayesha, comes to visit.

It's a new year at Abbott Elementary, and Janine is as eager as ever. She plans a district-wide initiative - Career Day - and is anxious for it to be a success. Meanwhile, Ava has a new approach to her job, and Melissa is asked a surprising question.