The IHP class graduates, with T.J. as valedictorian. (Part 2 of 2, and series finale)

The IHP class behaves obnoxiously when their bus breaks down at a rural truck stop.

With a wrecking ball ready to demolish the school, the IHP class waits to fund out who's to be valedictorian. (Part 1 of 2)

To save Dennis after a prank, Billy creates a fictional student -- who apparently gets the MIT scholarship Dennis wanted.

The class learns T.J. is more than just a contemporary-style musician when Billy discovers her operatic talent.

Darlene promises to treat the class to an elaborate farewell dinner, but then finds her credit card revoked.

Inspired by his French class, Eric goes to ""find himself"" in Paris.

T.J. turns down Aristotle's invitation to the senior prom.

Charlie doesn't return for the new school year and the Kids are wondering where's Charlie? Charlie found an acting gig and left and now the students have a new teacher, Billy MacGregor.

Arvid's infectious flu may keep the class from performing in a Shakespeare competition.

Billy tries the personals ads.

Jasper's overprotective parents hire a babysitter for him -- and to his mortification, it turns out to be Sarah.

At Christmas, Billy helps Viki find her birth mother, but the woman doesn't want to see her.

When Alan is caught cheating, Billy has the class act as a jury to decide his punishment.

Arvid goes out with gorgeous Viki.

The kids work on their yearbook, with Eric beginning to regret not having participated more extracurricularly.

Simone's reputation suffers when Alex lies to his friends about a romance with her.

Billy fakes a heart attack to circumvent a health-insurance bureaucrasy; the IHP girls try writing a romance novel.

After Billy is robbe, he has the class write papers on gun control, leading Arvid to a harrowing experience when he buys a gun for the assignment. (Part 1 of 2)

Arvid trains a chimp at his part-time pet store job and, rather than let it be sold, hides it in the classroom.

Bully Zach may have Arvid's missing gun. (Part 2 of 2)

Billy and Bernadette take dance lessons at the studio where Alex teaches, and where he's pursued by a woman.

A high school substitute teacher takes over a class of geniuses.

The class imagines life 20 years in the future

Dennis misquotes Mr. Moore for the school newspaper