*Somefansbelievethistobe the American wizarding school that [[J. K. Rowling]] claimed in an interview would be mentioned in ''[[Harry Potter and the Goblet of Fire]]''. However, assuming she meant "American" to mean the Americas in general rather than merely the [[United States of America|United States]], [[Brazilian wizarding school|another American school]] is mentioned in the same book. Additionally, the only known members of this institution are described as middle-aged (though they couldbeteachersoralumni).
*Theywereclearlynotfroma school, there is toomuchevidencesuggestingotherwise
*Assumingitisnotaschool, the institution may be a magical counterpart to the [[Wikipedia:Women's Institutes |Women's Institutes]], though these only exist in [[Great Britain]] in the real world.
*Nowizardingschoolswereeverestablished in the Western world
*The banner which displays the school's name is described in ''Harry Potter and the Goblet of Fire'' as a "spangled banner", possibly the American Flag, which is "spangled" with stars and referred to in the American National Anthem as "the star-spangled banner".
The Salem Witches' Institute is a magical institute, possibly a school, presumably located in Salem, Massachusetts. Based on its name, it presumably only accepts female members. Some of the institute's members attended the 1994Quidditch World Cup, and were gossiping happily in between two tents bearing their school's name.
Behind the scenes
They were clearly not from a school, there is too much evidence suggesting otherwise
No wizarding schools were ever established in the Western world