Mr. Ruhle is the principal of Walkerville Elementary. He once ran a bet with Professor Frizzle on whether or not she could beat the light pinball machine she and Liz had built (Makes a Rainbow). He is an expert on chickens, owning a Rhode Island Red rooster named Giblets, who Dorothy Ann had accidentally lost in Cracks a Yolk.
In the original series, he was voiced by the late Paul Winfield. In Rides Again, he is voiced by Martin Roach.
Trivia
- There are pictures of Giblets on his wall in the original series, implying that he has a bond with an animal, just like the Frizzle sisters and Goldie/Liz.
- It's revealed in Carlos Gets the Sneezes that he is allergic to rats.
| Staff | Professor Valerie Frizzle (professor) | Ms. Fiona Frizzle (teacher) | Mr. Ruhle (principal) | Mr. Sinew (gym teacher) | Mr. McClean (janitor) | Mr. Wilde^ (assistant principal) | Mr. Quiggin^ (librarian) |
|---|---|
| Students | Alex^ | Amanda Jane^ | Arnold | Carlos | Carmen^ | Dorothy Ann | Florrie^ | Gregory^ | Janet** | John^ | Jyoti* | Keesha | Michael^ | Mikey** | Molly^ | Phil^ | |
| Animals | Liz | Goldie |
| Vehicles | The Magic School Bus | Sensemobile V | Professor Frizzle's Motorbike |
