When Ella Mentry School invites a local dentist to speak on National Dessert Day, A.J. and his friends uncover the dentist's secret plot to promote cavities for more business.

Ben and Ellie's class has a new teacher, and it's a dog named Riff!

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.

Led by Duncan "Gluestick" Dewey, the NERDS team uses brain power and courage rather than gadgets when they face off against supervillian Simon, his band of savage squirrels, and Albert, a middle-aged computer genius who lives with his mother.

Alexander's class is going on a sleepover at the Stermont Museum, but something is stealing bright, shiny objects from all over town, including the museum's treasured Ruby Scorpion, and on the night of the visit the young monster hunters finally confront the town's newest monster--a warrior covered entirely by bubble-wrap.

"Raj has one steadfast rule: NEVER USE THE BATHROOM AT SCHOOL! Of course, it can be challenging to follow this rule. After all, sometimes, a person's gotta go! So Raj has come up with a series of how-to rules to help him "hold it" -- avoid all liquids; stay very still at recess; squeeze your knees tight, stay away from funny friends who might make you laugh too hard, and at all costs, avoid sneezing. But, inevitably, Raj ends up accidentally breaking...

"A.J. and the gang are celebrating Saint Patrick's Day with all the classic activities. But when A.J. spots a little man dressed head-to-toe in green sneaking around, it can only mean one thing: a real-life leprechaun! And one that's wreaking havoc all around the school! Will the Ella Mentry School kids be able to catch the leprechaun before he causes even more trouble?"--

Eva wants to be friends with Hailey, the new owl in her class, but when Hailey seems to prefer Lucy's company, Eva starts to feel left out, and even a little jealous of her best friend.

Missy wants to take home the class pets, but another girl, Tiffany, has already asked their teacher so Missy and her friend Oscar need to come up with a plan to make Tiffany change her mind.

Alexander is used to finding monsters everywhere in Stermont, but now the school is being turned into an icebox by giant meat-eating vegetables--and his friend Rip has gone missing.