Ms. Frizzle

Ms. Valerie Frizzle (sometimes known as "The Friz") was an eccentric fourth grade science teacher at Walkerville Elementary School. She uses a variety of unusual magic devices to teach the class scientific concepts. The most notable of these is her magical school bus, a shape-shifting vehicle that seems to have a mind of its own sometimes. Although Ms. Frizzle denies Arnold's claim that she knows everything, she always seems to know what her students are up to, even when they think they're keeping her in the dark, as well as seems to answer every question that her students ask. Ms. Frizzle has a first cousin named Murph who owns and operates her own recycling plant.

Appearances in Christmas specials

 * Holiday Special (The Magic School Bus)