Is it farther or further?
division of an institution of higher learning that conducts educational activities for persons (usually adults) who are generally not full-time students. These activities are sometimes called extramural studies, continuing education, higher adult education, or university adult education. Since its inception, group instruction in the form of formal lectures, discussion groups, seminars, and workshops has remained the core of extension courses. One important consequence of the extension movement was that it helped to establish higher education for women.