A.J. and his friends get a Personal Digital Assistant named Miss Porter as a substitute teacher, who can order pizza and tell endless jokes, but grows power-hungry when her system is changed and tries to take over Ella Mentary School.

"A.J. is turning nine, so he's inviting all his family, friends, and favorite teachers over for a backyard birthday bash. His parents even hire a popular party planner, Mr. Marty. But what happens when Mr. Marty accidentally orders rival clowns, a bubble blower, and even a singing cowboy to entertain guests?"--

The new lunch lady at Ella Mentry School, Ms. LaGrange, writes secret messages in the mashed potatoes and tries her best to get A.J. and the other students to eat healthy foods.

"There's a new principal at Ella Mentry School. Yes, it's true! Mr. Klutz is retiring and the president of the Board of Education, Dr. Carbles (Boo! Hiss!), has hired the best person for the job -- or at least the funniest. But stand-up comedian Mrs. Stoker will have to face Vice Principal Mrs. Jafee in a big joke-off duel to defend her new job. Will Mrs. Stoker have the last laugh? Or will shoe lose her audience when things get serious?"--

Mrs. Cooney, the school nurse, is so beautiful that A.J. has a crush on her--even though he suspects she might be an international spy!

When Miss Newman, a local television meteorologist, visits the students of Ella Mentry School, their lessons on weather become a real adventure when a hurricane comes to school.

"On the first day of school, Rappy the Raptor uses his raps and rhymes to deal with a bully and make a new friend"--

A local college professor comes to Ella Mentry School to help students learn basic history and improve their scores on a standardized test, using some very unusual techniques.

"A.J. and the gang at Ella Mentry School are in for a super surprise when a new teacher, Mr. Cooper, take over their third grade class"--

A.J. and Andrea go on a class trip to the museum, where their guide has been warned about their possible misbehavior.