Getting a chance to choose a guest speaker at their third grade graduation, A.J. and his classmates have their minds set on the most popular singer and rapper in the world, Lil Mouse, to have the greatest graduation in the history of graduations.

A.J.'s class is going head-to-head against Dirk School in a charity softball game. The losing team must clean the winning school's toilet with a toothbrush! Mr. Ott, retired baseball pro, intends to lead Ella Mentry School to victory, but will his weird tactics actually make the team lose?

"A. J. and his friends from Ella Mentry School are in for a weird Christmas surprise when they head to the local mall to see Santa Claus"--

"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?"--

The new music teacher must try to teach A.J. and the rest of his class to play well enough during their recital to impress crabby Dr. Carbles.

It's time for the Ella Mentry talent show! This year Principal Klutz has hired a professional, Mrs. Lane, to help the kids with their talents. But what will A.J.'s talent be? And what happens when the talent show gets put on TV?

Ella Mentary School is having a science fair! Guest scientist Dr. Snow has arrived to help A.J. and his friends conduct their own cool experiments. But what is "the snowman" really planning? And what does STEM even stand for anyway?

On Saint Patrick's Day, A.J. spots a real-life leprechaun sneaking around the school and causing havoc. Can he and his friends catch the leprechaun before there's even more trouble?

"A special guest has arrived at Ella Mentry School! Professor Pitt is the president of a local art museum and has all sorts of wacky ideas about art. A.J. thinks it's all a total snoozefest ... until the piece he turns in for an art assignment gets praised as a work of genius! Suddenly, Professor Pitt is introducing A.J. as the next big thing to happen to the art world. What could possibly go wrong?"--

With guidance from Miss Brown, a teacher who is an expert on creativity, the third grade class at Ella Mentry School builds a car and a bridge to compete in a Brain Games competition against Dirk School.