Amateur wrestling is the most wiespread form of sport wrestling. There are two international wrestling styles performed in the Olympic Games under the supervision of FILA (Fédération Internationale des Luttes Associées or International Federation of Associated Wrestling Styles): Greco-Roman and freestyle. Freestyle is possibly derived from the English Lancashire style. A similar style, commonly called collegiate (also known as scholastic or folkstyle), is practiced in colleges and universities, secondary schools, middle schools, and among younger age groups in the United States. Where the style is not specified, this article refers to the international styles played on a mat.