A.J. and the other students at Ella Mentry School brave trick-or-treating at the school secretary's house, even though it is supposedly haunted.

"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"--

When Mr. Granite falls ill, A.J. and the gang endure a wacky week with a perpetually cheerful substitute teacher who wears a clown costume, uses hand puppets to talk, and uses magic tricks to saw students in half and make them disappear.

When boring Mr. Loring retires, 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.

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.

Mr. Docker, a new science teacher, is a crazy inventor who blows things up, uses potatoes for power, and has A.J. and his friends wondering whether science is for nerds or is the coolest subject ever.

With the peculiar Mrs. Kormel at the wheel, anything could happen on the bus ride to Ella Mentry School, as A.J. and his friends find out on the day they have to go out of their way to pick up "the nude kid."

As the new computer lab teacher tries to bring Ella Mentry School into the twenty-first century with her peculiar inventions, second-grader A.J. struggles to survive without sugary snacks when Principal Klutz bans junk food.

Help! With the Recess Enrichment Program, A.J. and the gang have to take classes even during recess! The new teacher, Mrs. Lizzy, teaches how to make balloon animals, how to compost worms, and lots of other weird useless skills that nobody would ever want to know in a million hundred years!

"It's time for the annual Ella Mentry School talent show, and this year Principal Klutz has hired a wacky professional, Mrs. Lane, to help the kids with their talents"--