"Friends and pranking partners Miles and Niles face a tough challenge when their favorite goat and nemesis, Principal Barkin, is replaced by his stern, no-nonsense father, Former Principal Barkin, who turns the school into boot camp"--

With her perfect attendance record, Pinkalicious gets to be principal for the day, but when she wakes up sick, she worries that her big day will be ruined.

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

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.

Attending high school in Steamboat Springs is Ida Bidson's dream--it's her next step toward becoming a teacher and her best shot at escaping a life of milking cows. It's 1925, and from using telephones to attending movies, Ida is thrilled by her new experiences in Steamboat. She and her school friends even form a club, the Secret Sisters, to celebrate everything modern. But when they accidentally antagonize the strict, traditionalist principal, Ida's...

Principal Krupp once again turns into the superhero Captain Underpants in order to save the world, and Jerome Horwitz Elementary School, from the evil talking toilets and the Turbo Toilet 2000.

When George and Harold hypnotize their principal into thinking that he is the superhero Captain Underpants, he leads them to the lair of the nefarious Dr. Diaper.