After Susan sees Mr. Smith the substitute teacher peel off his face, she knows he's an alien and only Peter believes her. Together they work to save the class from Mr. Smith's horrible plans.

The kids in Room 207 take advantage of their teacher's good nature until she disappears and they are faced with a vile substitute.

"Cat is not so keen on stepping in as substitute teacher at Kitty School, but he's surprised by how much he's able to teach the kittens--and how much he learns from them."--

An elementary school class must contend with a substitute teacher that seems like the monster Frankenstein.

Sam, Lucy, and Antonio have a new substitute teacher, who happens to be the great-great-grandson of Orson Eerie, the evil scientist whose spirit possesses and infects their elementary school--and the friends are afraid he may be trying to bring Orson back to life.

Oh no! Mr. Granite is sick. A.J. and the gang will have a substitute teacher all week. Yay! But Miss Kraft is weird. She wears a clown costume and uses hand puppets to talk. She likes to do magic tricks. And she's happy all the time. What is her problem?

When a sinister substitute teacher takes over their class, it is up to Eugene and the rest of the Sunnyview Superhero Squad to find Ms. Beasley and foil the sub's plot.

When sixth-grade classroom terror Jacob Wonderbar and his friends Sarah and Dexter find a spaceship crashed in the woods near their suburban neighborhood, their discovery leads them to a series of adventures including space travel, substitute teachers, kidnapping, and more.

When his teacher is out sick for a week, Martin MacGregor has a difficult time with the homework assigned by the substitute teacher.

Dive into four new stories about Narwhal and Jelly becoming substitute teachers! The two best friends come across an enthusiastic school of fish one morning. Unfortunately, Mr. Blowfish, their teacher, has come down with a cold, and class will have to be cancelled ... until Professor Knowell (Narwhal) and Super Teacher (Jelly) volunteer to help out! The first subject is Wafflematics, in which Narwhal and Jelly calculate the number of waffles needed...