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

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?

A.J. is planning a big birthday to celebrate turning 9 and his parents even hire a party planner named Mr. Marty. Mr. Marty orders some weird stuff to celebrate though.

Test scores are low and stress levels are high at Ella Mentry School so wellness expert Ms. Jo-Jo comes to help A.J. and his friends relax so they can pass the upcoming Fundamental Arithmetic/Reading Test.

"Prepare for weirdness when Ella Mentry School gets a French foreign exchange student just in time for Valentine's Day!"--

When the students of Ella Mentry School receive a million-dollar donation and vote to create an in-school, state-of-the-art TV station so the morning announcements can be broadcast to all the classes, A.J. and the gang wonder about the agenda of their new teacher, Ms. Cuddy, who decides the announcement ratings are too low and has some quirky ideas about how to increase the station's popularity.

New lunch lady Ms. Hall is obsessed with healthy food and she makes it her mission to get A.J. and the gang to eat more vegetables, but they won't take this sitting down.

"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?"--

"It's very important for kids to learn about fire safety, and Mrs. Meyer of the local fire department has been brought in to teach the students at Ella Mentry School. But she is the weirdest safety expert in the world. She likes fire just a little too much. Will Mrs. Meyer catch on fire? Will she retire? What will transpire?"--Jacket.