Distance Education
저자: Shanell Massenburg

1. Industrial era
1.1. evolutionary
1.2. asynchronous
1.3. autonomous/self-directed
2. Technology
2.1. print
2.1.1. Mail
2.2. media
2.2.1. television
2.2.2. radio
2.3. internet
2.3.1. mobile
2.3.2. digital