Dan Gutman

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.

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?

Tired of following the strict rules of their grumpy replacement principal, second-grader A.J. and his classmates try to find a way to bring back eccentric but lovable Principal Klutz, who was fired for bringing a wild turkey to the school's Thanksgiving Day assembly.

Joe uses his ability to travel through time using vintage baseball cards to take his coach Flip with him to find out whether Satchel Paige really was the fastest pitcher ever.

A.J. and his classmates are convinced that the new school librarian, Mrs. Roopy, has multiple personality disorder because she keeps pretending to be famous people. Mrs. Roopy, the new librarian, comes to school wearing a pot on her head! One day she thinks she's George Washington, and the next day she's Little Bo Peep! The worst part is, she doesn't even know how crazy she is! In fact, all the grown-ups at A.J.'s school seem to have something wrong...

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.

A.J. and the other second graders do everything except play sports when they go to "fizz ed" class with their new teacher, Miss Small.

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.

It's Poetry Month and Ms. Coco, who runs the gifted and talented program, is poetry crazy! She cries when she sees a sunset! She thinks boys should have feelings! She talks in rhyme ! All the time! Will A. J.'s life ever be normal again?

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.