Stoa USA, also referred to as Stoa, is a Christian homeschool forensics organization in the United States. It is one of the four major national high school forensics organizations: the others are the National Speech and Debate Association (NSDA), National Catholic Forensic League (NCFL), and the National Christian Forensics and Communications Association (NCFCA).

The Christian Speech & Debate League, also known as the National Christian Forensics and Communications Association, is a speech and debate league for Christian students in the United States. The NCFCA was established in 2001 after outgrowing its parent organization, the Home School Legal Defense Association (HSLDA), which had been running the league since it was originally established in 1995. NCFCA is now organized under its own board of directors with regional and state leadership coordinating various tournaments throughout the season.