The kids take in a really ratty stray cat that they find near the dumpster, naming it Stuart.

The main kids discover that Gus was once a notorious dodgeball player who went by the name of El Diablo.

Gus winds up the new target of the school bully's wrath.

The main kids wish they could have the overcrowded school to themselves, then surprisingly get their wish.

The original 1935 edition of The Rules of the Playground is discovered in the library.

Spinelli will do anything to keep her parents from attending parents' night and meeting the others.

Ashley A. hooks up with Gretchen when she sins against the clique so gravely as to get thrown out.

All the kids go on a big field trip to MISOOE (The Museum of Industry, Science, Oceanography, Oddities and Energy). But Ol' Smokey, the beloved school bus, breaks down in the middle of nowhere.

Gretchen turns to former yo-yo champ Tommy Tate to learn how to master the yo-yo.

When one of T.J.s plans goes wrong and Gus breaks his leg he won't make another plan. It's up to the others to get T.J. back to his old self

The kids carry out a crucial experiment to see if it's really true that kissing each other is an inevitable part of their future.

The gang breaks up when they are forced to choose a best friend to write about.

Miss Finster agrees to babysit Spinelli for the weekend while her parents are away.

When the playground goes on the monsticker standard T.J. goes down the path from poverty to wealth.

T.J. breaks his clavicle and now has to spend recess with the ""pale kids"" in Room 51.

The kids rope T.J. into a challenge to play a prank on King Bob before the end of the school day.

T.J. and the gang meet Mr. Dudicoff, a student teacher who was a legend at 3rd Street School back in the day.

Mikey makes the other kids regret not letting them play on their team for the playground's soccer tourney.

The Ashleys jinx Gus according to the playground rules so that he can't talk until his friends say his name.

Spinelli gets labelled a mama's girl when she inadvertantly calls Ms. Grotke ""Mama.""

Gus finds a tile from the game Ajimbo and soon the entire student body gets caught in its evil grasp.

A visit from Principal Prickly's brother Paul leads to a challenge between 3rd Street and 98th Street kickball teams.

Principal Prickly and Miss Finster deem T.J.'s word "whomps" as a cuss and punish him for it, starting a scandal that leads all the way to the board of education.

Everyone is segregrated once the Ashley's start giving ratings to everyone on the playground.

Señor Fusion: the Movie finally opens and T.J. vows to be there at its first screening.