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.

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.

Everyone likes veggies, right? Wrong! When Principal Stoker decides that Ella Mentry School needs a vegetable garden, A.J. and his friends just want to plant junk food. But when gardening expert Miss Nichol comes to oversee the planting, things get totally out of control. What could possibly go wrong?

"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?"--

"A.J. and the gang from Ella Mentery School start a company to sell their brand new invention-a heated, scented, talking toilet seat!"--

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.

"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 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.

"Mr. Klutz is retiring! (A surprise even to him, courtesy of scheming Dr. Carbles.) Vice principal Mrs. Jafee thinks it's her time to shine, but Dr. Carbles has hired someone else for the job! Stand-up comedian Mrs. Stoker is ready to defend her place as principal in a joke-off against Mrs. Jafee. Will Mrs. Stoker have the last laugh? Or will she lose her audience when things get serious?"--Provided by publisher.

"Me llamo A.J., y en mi colegio pasa algo muy raro...La señorita Lulú no sabe sumar, ni restar, ni multiplicar, ni dividir. Y no es solo eso... Tampoco sabe leer ni escribir. ¡Es la profesora más burrícola de la galaxia!"--