When South Park Elementary hires Randy Marsh to teach the fourth grade class about the formula for penis size, he ends up teaching the formula incorrectly. The school then hires Rebecca to replace Randy, who gets in a fight with her and is sent to anger management.
She appears again at the end of the episode, where she announces changing the national average for penis size from 6 inches to 1.5 inches, making anyone with a T.M.I. of over 1.5 inches above average.
Rebecca wears a gray business suit with a white undershirt, a gray skirt, black slippers, gray reading glasses, and silver earrings on both ears. She has combed brown hair and brown eyebrows.