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Local Area Info: List of The Magic School Bus characters

The school is known as Walkerville Elementary, named for the fictional town of Walkerville, where it is located. The original book series had a larger number of students in Ms. Frizzle's class (19 instead of 8); 11 characters were omitted in the TV series, the TV tie-in books (based with the TV series), and the video game series.

Valerie Felicity Frizzle is a third grade teacher at Walkerville Elementary. In the first series she is normally referred to as Miss Frizzle or Ms. Frizzle, but her students often call her "The Friz". While she is eccentric and somewhat strange, The Friz is intelligent, kind, resourceful, happy, funny, supportive, loving and somewhat motherly. She loves making jokes revolving around the lesson she teaches, even if she is the only one laughing. She makes flamboyant entrances to start the class, causing some to remark "How does she do that?" A redhead, she wears wacky dresses that reflects the subject of each adventure and earrings that glow before a field trip begins. She usually winks before the earrings glow (in the original books, her dress on the last page usually hinted at the plot of the next book; the very last book sees it covered with question marks). She enjoys singing, seems unafraid of danger, and often refers to her relatives or ancestors during trips. She can make a lot of jokes like Carlos, and she also admires Carlos' jokes. She appears to be very attached to the bus, almost as if having a nostalgic connection to it. She also loves to surprise the students and although she denies that she knows everything, she seems to never be in the dark about her students' activities. To Arnold, she is strange, but he and his friends still love and respect her. Some of Ms. Frizzle's ongoing catchphrases are, "Bus, do your stuff!", "Take chances, make mistakes, get messy!", "Hit it Liz!" and most notably, "WAHOOOOO!" Mrs Frizzle is also notably suffering from some form of hyper-activity, which leads to some very interesting and exciting episodes.

She appears in The Magic School Bus Rides Again as Professor Valerie Felicity Frizzle, Ph.D, with Tomlin once again providing her voice. In this series, she answers phone calls in the fictional call-in segments (replacing the producers seen in the original series), along with her pet monkey named Goldie, and usually gives some clue as to the topic of the next episode. Mostly, in the new series, she sometimes but not always shows up, and is always known for being shown at the ending.