Synopsis by Perry Seibert
The boys don't like their new teacher in this episode of South Park. Their new fourth grade instructor, Ms. Choksondik, is not as much fun as Mr. Garrison, so the boys attempt to time travel back to third grade. With the help of a pair of nerds, they turn Timmy's wheelchair into a time machine, but he ends up being chased by dinosaurs. Mr. Garrison finally learns the truth about his own sexuality, which causes problems for him at his job. A typically irreverent episode of South Park, "Fourth Grade" first aired November 8, 2000, on Comedy Central.