3rd Grade Male Monkey is an unnamed third grader who made his debut in the episode Desk Wars. He was part of a group of four students, that were in Mr. Ratburn's class. He and the three other students didn't get involved with the arguments or threats of ruining others' possessions until the rest of the class broke out in chaos. After that episode, he then appeared in the episode Desert Island Dish in Mr. Ratburn's class again.