Arnold is alarmed to discover that the beloved Ms. Frizzle has been promoted and her younger sister Fiona is taking over the class. His worries come true when a simple field trip results in the Galapagos Islands being overrun by invasive bunnies. Can Arnold save the islands, and will he ever learn to like his new teacher?

Ellie buys a snake egg from the sinister science teacher Ms. Fleek in room 201, and hides it in a cage in her closet, but when it finally hatches--well, snakes are not supposed to have legs and wings, are they?

Alex, who lives with her uncle in the flat above their doorknob shop, meets her new teacher, Mr. Underwood, a descendant of a famous pirate, and soon three vicious men turn up in town, looking for a map to a fabled family treasure.

"When a run of bad luck hits the local gym team, the Star Friends suspect that dark magic is behind it. But are their Star Magic skills strong enough to fight back?"--Publisher's description.

Loving their gifted teacher, three boys are dismayed when the teacher falls ill and leaves for the rest of the school year, a situation that compels them to share their stories while cutting class and journeying across town together on a fateful day.

Steve "Sneeze" Wyatt attempts to thwart his parents' plan to have him skip eighth grade, but he has bigger problems when his friends disapprove of his new list and Mrs. "Fierce" Pierce threatens to keep him from the Invention Convention.

While finding new vegetable names to call her little brother, eight-year-old Clementine hatches a plan to prevent her beloved teacher from being selected to go on a once-in-a-lifetime research trip to Egypt.

When a kindergarten class arrives for the first day at school, they are greeted only by the words "Mr. S" on the chalkboard and a delicious-looking sandwich, resulting in merry mayhem as the kids wonder if the sandwich is their teacher.

When Pete discovers that his teacher is sick and his mom is the substitute, he must teach her the ins and outs of his school.

Substitute middle-school history teacher Rush Revere takes his students back in time to explore the night "The Star-Spangled Banner" was written.