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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.

A.P. Bio

The Harvard Pen

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.

Malachi

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.

Love, for Lack of a Better Term

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.

The Perfect Date From Hell

When the 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.

Tons of Rue

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.

An Oath to Rusty

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.

Sweatpants

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.

Tornado!

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When Harvard professor Jack Griffin fails to get his dream job, he reluctantly moves back to Ohio to work as a high school Advanced Placement Biology teacher -- but he makes one thing clear: he will not be teaching one bit of biology.

S4 E1 | Tornado!

E8 | The Harvard Pen

E7 | Malachi

E6 | Love, for Lack of a Better Term

E5 | The Perfect Date From Hell

E4 | Tons of Rue

E3 | An Oath to Rusty

E2 | Sweatpants

E1 | Tornado!