Distance education is teaching students who are not physically present in a traditional classroom setting. It focuses on delivery methods using technology to teach remotely. Early forms included print materials, audio/video cassettes, radio, and television. More advanced methods are teleconferencing using audio, graphics, video, and computers. The internet allows web-based instruction through tools like videoconferencing and learning management systems. Distance education aims to provide accessible learning to those not enrolled in traditional schools or to supplement campus-based education.