Only Captain Underpants can stop the three evil space aliens who have invaded Jerome Horwitz Elementary School and turned everyone into lunchroom zombie nerds.

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.

"When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot." --

Owen and his friends decide that spying on the school principal at his own house will be a fun challenge.

A skateboarding principal offers unusual incentives to his students to motivate them to learn more.

When the new vice principal is put in charge of Ella Mentry School for a few days, she tries out some very unusual ideas about how students learn.

George and Harold are usually responsible kids -- whenever anything bad happens, George and Harold are usually responsible! This time, their latest prank backfires, and they accidentally invent an army of terrifying talking toilets. Luckily, they know a superhero with enough snap in his waistband to save the day! This looks like another job for the amazing Captain Underpants!--

"When a storm strikes at Blackbrook Academy, an elite prep school nestled in the woods of Maine, a motley crew of students--including Beth 'Peacock' Picach, Orchid McKee, Vaughn Green, Sam 'Mustard' Maestor, Finn Plum, and Scarlet Mistry--are left stranded on campus with their headmaster. Hours later, her body is found hanging in the conservatory and it's very clear her death was no suicide. With this group of students who are all hiding something,...

"The principal of Jill and Gwen's school promised to spend the morning on the roof if the kids read one thousand books during their reading marathon--and they did! Now he's on the roof, and he's going to read an original science fiction story Gwen wrote..."