A.J. and his classmates are convinced that new school librarian, Mrs. Roopy, has multiple personality disorder because she keeps pretending to be famous people.

A skateboarding principal offers unusual incentives to his students to motivate them to learn more.

A.J. and his friends are afraid that Ms.Todd, their substitute teacher, has killed their regular teacher and is trying to take over her job.

Ella Mentry School's security guard proves overzealous in his pursuit of a peanut-butter-and-jelly-sandwich thief.

Boring Mr. Loring retires, and A.J.'s class gets a new music teacher who raps, break-dances, and thinks he has what it takes to become a famous musician.

School's almost out for the summer, and A.J. is dreaming about all the fun things he's going to do on vacation. But A.J.'s dream quickly turns into a nightmare when three familiar spirits appear to show him summers past, present, and yet to come. Will they be able to convince him to leave his bad ways behind? Or will this summer end up being a total bummer? Best selling author Dan Gutman brings his kid-friendly sense of humor to this special series...

When the hippie crossing guard, Mr. Louie, puts a love potion in the water fountain before Valentine's Day, everyone at Ella Mentry School falls in love.