Zach (Marge the Sellout)

Zach is a college student.

History
Homer was visiting Old Springfield Library and pretending to be a professor because Bart had told him to pretend it was Opposite Day. Homer helped some college students with their homework, among them Zach and Screech, who were grateful for his assistance.

Behind the laughter
Zach is a character from the sitcom Saved by the Bell.