Ms. Frizzie takes her class through the life cycle of a water drop, on the journey of a boulder subject to water erosion and on a trip to the bottom of Walkerville Lake.

When Arnold accidentally swallows his miniaturized class, his digestive system becomes the class field trip!

The class learns that the town swamp is an important habitat and natural water filter, but the town council's not convinced until...FLOOD!

Arnold's know-it-all cousin Janet drives the kids crazy when she joins Ms. Frizzle's class on a field trip and gets them lost in outer space!

Ms. Frizzle takes the class to the rain forest to meet Inspector 47 who keeps a mud-free cocoa grove. What has he done to the rain forest's intricate ecology web?

Always the caring soul, Phoebe goes on a crusade to save the animals and plants of the desert - and discovers how well they take care of themselves.

Ms. Frizzle takes the class on a dinosaur dig, courtesy of her old school chum, a paleontologist, and travels 67 million years back in time!

At this year's "Teacher-athalon," the kids fear Ms. Frizzle doesn't stand a chance against the muscle-bound gym teacher from another school.

Ms. Frizzle takes the class on a field trip to R.U. Humerus's (Tony Randall) Body Shop.

The class' garden is going to be featured on the cover of PLANT IT magazine, but Phoebe's garden plot is empty. Ms. Frizzle to the rescue! Wahoo!