With his friend as campaign manager and his former babysitter as running mate, twelve-year-old Judson Moon sets out to become President of the United States.
A.J. and his fellow third-graders from Ella Mentry School, including new student Alexia, go on a field trip to the zoo, where they meet a very strange zookeeper.
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.
After budget cuts threaten the art and music programs at Ella Mentry School, as well as some services, groundskeeper Burke finds gold and "gilver" on the playground, causing a modern-day gold rush.
On Career Day at Ella Mentry School, local reporter Mrs. Lilly helps A.J. and his fellow third-graders start a school newspaper, but their efforts have unexpected, and terrible, consequences.
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.
On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.
A school trip to the natural history museum goes awry when the curator, Ms. Krup, loses her giant cockroach and A.J. and his friends decide to explore the museum in the middle of the night.
When A.J. and his friends sign up for Beaver Scouts, they find that their scout leader, Miss Blake, is only interested in preparing them for emergency disasters.
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.
Genius twins Coke and Pepsi McDonald embark on a trip to Graceland and are horrified by the reappearance of their supposedly deceased arch nemesis Dr. Herman Warsaw, who marries their aunt Judy.
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.
A.J. and his classmates are convinced that new school librarian, Mrs. Roopy, has multiple personality disorder because she keeps pretending to be famous people.
Even though people say Mrs. Patty, the school secretary, is a witch and her husband is a ghost, A.J. decides to take the risk and trick or treat at their house because they are known to give out the best Halloween candy in town.