Jack Griffin loses out on his dream job and becomes a high school teacher of Advanced Placement biology in his hometown of Toledo, Ohio.

When Jack leaves his class unattended, a student injury sets off an official investigation and lands Jack in "teacher jail." An aggressive teacher's union rep sets her sights on Principal Durbin. The students' excitement for a substitute teacher are dashed when they find out it's Helen.

While Principal Durbin struggles with budget cuts, Jack discovers his students pity him - so he rallies, making a splash at the school bake sale and getting kicked out of the bookstore for life.

When Jack gets into a petty dispute with the student council president, the situation escalates much too far; Stef sells makeup at school as a side business.

Jack reluctantly agrees to go out on the town with Mary, Stef, and Michelle; his superiority complex proves difficult for the women to overcome; principal Durbin feels threatened when Helen fills in for him on the school's morning announcements.

When Jack is attracted to a student's mother at a parent-teacher conference, he feigns interest in her son; a group of parents complain to principal Durbin when they notice a piece of controversial student art from Mary's class.

Jack receives an offer from Miles' publisher to write a book of feel-good philosophy that could be his ticket out of Toledo. Durbin accidentally sets off an emotional firestorm when he reveals that while Stef chose Mary as her emergency contact, Mary chose Michelle.

Jack finds out his ex-girlfriend Meredith needs a venue for a charity fundraiser and has the perfect place: his student Victor's house. Victor and the other kids are inspired by Jack to party for the first time.

Jack is incensed when his dead mom's former lover shows up and suggests they commemorate her birthday. Jack taps his students to help him retaliate, but the students' hands are already full - of crying robot babies. Stef's kindness toward Dale the janitor sends the wrong signals.

When Jack casually gives Durbin some marriage advice, it backfires, gets Durbin kicked out of the house, and Jack takes him in. The A.P. Bio kids tell Jack if they can get Miles' DNA, they'll learn a little biology while pulling off the ultimate revenge.

When one of Jack's students anonymously reports him for canceling their much-anticipated fetal pig dissection, he sets out to find the snitch. Durbin's chances at Principal of the Year are in jeopardy when the superintendent visits.

Jack successfully convinces Miles that Devin is his illegitimate son; Durbin, Mary, Stef and Michelle clash on the Sadie Hawkins dance theme.

Jack takes interest in a revenge mission on behalf of the kids; Mary, Stef and Michelle believe they've discovered an otherworldly presence.

With no archrival to combat, Jack sets his sights on a new mission: write the most brilliant philosophy book ever and get out of Toledo for good. Stef and Mary forget a special day for Michele. Helen forgets to order routine maintenance for the copier causing mass hysteria at Whitlock.

Jack is offended when he discovers a local church received a sizable bequest from his dead mother and used it to by a Virgin Mary statue. In an attempt to get revenge, he ropes his students into helping him steal the statue. Meanwhile, Mary, Stef and Principal Durbin attempt to give the right advice to Michelle who is having marital issues at home, but she ends up getting comfort from an unexpected source.

In the hectic thirty minutes that start every day at Whitlock, Jack tries to retrieve his massage chair from Whitlock's intriguing payroll accountant, Lynette. Durbin and Helen prepare for the morning announcements. Michelle gives a eulogy.

Jack is aghast to learn he didn't make the Top 10 in Toledo's Top 100 Bachelors, and Durbin did. Victor and Eduardo decide it's time to reveal their feelings to their crushes.

Jack uses Michelle's annual murder mystery party to impress Lynette. Meanwhile, in a moment of desperation, the students break into Whitlock High to steal the A.P. Bio practice exams.

Jack's war with his neighbor reaches a turning point when it threatens to ruin a date with Lynette; when the school photographer ups his rate, Durbin takes school pictures into his own hands.

Jack is outraged when his old high school bully is hired as a motivational speaker at Whitlock. Meanwhile, Mary, Stef, and Michelle set their own personal goals of female empowerment, unintentionally causing a rift between Helen and Durbin.

When budget cuts threaten to gut Whitlock and put his job in jeopardy, Jack recruits Mary, Stef, and Michelle to take down the Superintendent. Durbin plans an appeal to the heart, while the students plan an appeal to the soul.

After an embarrassing video of him falling off a stage goes viral, Jack plans a viral video of his own. Durbin, Helen and the teachers track down Whitlock's most notorious litterer: The Sugar Daddy.

When he's kicked off his Harvard phone plan, Jack is offered a chance to leapfrog onto Mary's on one condition -- he must help her break up with her scuzzy boyfriend. Anthony becomes Durbin's right-hand man.

After his computer breaks, Jack rallies his class to win the annual Whitlock's Got Talent competition so the prize money can go toward a new laptop. Helen and Durbin host the show. Mary, Stef and Michelle prepare a hand-bell routine.

It's the most exciting time of the year at Whitlock: Durbin's birthday and Spirit Week; Jack does his best to steer clear of any school spirit as everyone else comes together to take down their hated rivals at Prairie High.

The college fair comes to Whitlock, and Sarika has an offer for Jack: Get her into Harvard, and she'll get his book into the hands of her publisher aunt; Stef prepares for a visit from a fling; Helen applies to college.

Jack and his students plot revenge while Helen goes back to school to get her high school degree.

Mr. Pugh plans a field trip. Jack agrees to ghostwrite a book but has a trick up his sleeve.

Jack loses a lot of money. As Principal Durbin investigates, students and teachers admit other sins.

Durbin tries to help Jack with a morning show appearance, but the principal lets fame get to him.

Jack goes to the doctor and gets the same procedure twice while Durbin and Helen embarrass themselves.

As the school goes on winter break, Jack falls asleep while plotting his next move.

Principal Durbin and Helen sweep lockers while Jack finds out about Anthony's extracurricular activities.

While the town prepares to celebrate Katie Holmes Day, Jack and Marissa plot to ruin the holiday.

A tornado puts the school on lockdown and Helen believes it's coming specifically for her; the kids pass the time by writing fan fiction, "shipping" various combinations of faculty members; Mary, Stef and Michelle devise a plan to escape the school.

Jack has the students form a fake cult to sabotage Principal Durbin's new school uniforms; Mary, Stef and Michelle prepare to see one of their favorite artists who is in town to perform.

Jack attempts to get closer with the guys at work by inviting them over for a game night; Helen helps Principal Durbin grow a backbone; Stef and Mary try to coax information out of Michelle about the court case she was a juror on.

When the A.P. Bio students reunite Jack with his deadbeat dad, Jack plots revenge by trying to expose his allegedly reformed father; a witch foretells of a grim future for Mary, Stef and Michelle that divides the women.

When Jack discovers his new girlfriend's therapy homework requires dating him, he turns the tables on her; Principal Durbin goes undercover to determine which faculty member is most worthy of a very special prize.

Victor attempts to catch up to his peers and become a man by sending Ashlanda a risqué photo; Grace and Anthony try to "Parent Trap" Mary and Principal Durbin after overhearing a conversation that makes them take pity on the single adults.

When Jack's girlfriend says she's going to dinner with a male friend, a jealous Jack tags along; Principal Durbin, Mary, Stef and Michelle take Helen out to cheer her up after a breakup.

Jack is enraged to find that the A.P. Bio students have stolen his beloved Harvard pen after he asked them not to touch it; Principal Durbin and Helen repeatedly fail the superintendent's inspections.