A.J. and his friends think that Ms. Todd is the strangest substitute teacher in the world, and they decide to investigate her.

When Mr. Granite falls ill, A.J. and the gang endure a wacky week with a perpetually cheerful substitute teacher who wears a clown costume, uses hand puppets to talk, and uses magic tricks to saw students in half and make them disappear.

When Milton Worthy learns his classroom's pet ferret is the evil mastermind behind a dastardly plot for world domination, it's more than just about any kid could handle. But then not every kid is the son of a member of the super-secret, super-awesome Society of Substitutes! Now it's up to Milton and his substitute teacher mom to save Beacher Elementary School before time runs out.

"Milton Worthy can't wait for his class trip to the city zoo. But little does he know that Noah--part time classroom pet ferret, part time evil mastermind--has escaped and stowed away on his school bus. Good thing that Mrs. Worthy, ace world-saving, member of the super-secret Society of Substitutes, is along for the ride! Will Milton and his super-substitute mom be able to stop the zoo from running completely wild?" -- Page [4] of cover.

When the origami pig that Song Lee made for her grandmother is seized by a substitute teacher, the usually well-behaved third-grader breaks a classroom rule to rescue it from the "June box."

Every day, Katie Woo is excited to go to school to see Miss Winkle. Except one day, Miss Winkle is sick and fancy Miss Bliss is there, teaching in her place. Katie wants to impress her new teacher, but no matter what she does, she just can't get it right.

Mr. Creacher, a multi-tentacled substitute teacher, warns his prankish students not to misbehave, recounting rhyming cautionary tales of the weird, spooky, and unexpected.

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.

In a series of letters a student laments the absence of her teacher and daily routine, but she soon realizes there are benefits to mixing things up, and that perhaps having a substitute teacher is not so bad after all.

Four Hispanic high school students organize a robotics club. With no experience, 800 dollars, used car parts and big dreams, this rag tag team goes up against the country's reigning robotics champion, MIT.