"A.J. is graduating! But a crazed PTA president is turning second-grade graduation into a huge affair complete with fireworks and skywriting. By the time this graduation ceremony is over, there won't be any time left for summer vacation!"--Jkt.
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.
New third grade teacher Mr. Granite has so many strange ideas about how to make Ella Mentary School environmentally friendly that the students are sure he must be an alien.
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.
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.
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.
Second-grade graduate A.J. and his family rent a beach house, but summer vacation is ruined when annoying Andrea shows up and develops a crush on the lifeguard.
"For A. J. and the gang from Ella Mentry School, a night of regular trick-or-treating turns into the weirdest Halloween in the history of the universe"--
When a British student-teacher arrives, A. J. and his friends wonder if her all-black clothing and love of blood sausage mark her as a vampire, while Mr. Granite simply hopes her musician-boyfriend will stay away long enough for a math lesson.
When Ella Mentry School is threatened with closure due to budget cuts, A.J.'s new speech teacher, Miss Laney, comes up with a brilliant, if weird, plan to save the day.
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.