Ralphie becomes convinced that the Friz is a vampire.

Dinosaurs.

Class sells light bulbs on Valentine's Day.

The class explores weather.

The class explores the inside of an anthill.

The class explores plant growth.

The class plays a frictionless baseball game.

The class tries to bake a birthday cake for Ms. Frizzle.

The class learns about sound, exploring a spooky mansion.

Phoebe explores a desert's animal and plant life.