PCF1 // Over the past two years, the Faculty of Education at the University of Southern Queensland (USQ), in conjunction with the University’s Distance Education Centre, has offered a Graduate Certificate in Open and Distance Learning. This course is taught fully via the World Wide Web (WWW), with all content presentation, teacher-learner and learner-learner interactions, assignment submissions and feedback being done on-line and via email. This Graduate Certificate has now been further developed into a Masters Degree program which will be offered solely on-line. // Both programs require of students and staff a different level of interactivity from what has been the pattern in on-campus programs and traditional distance education programs previously delivered via print and other media. // This paper examines the nature of these differences and explores the complexity of the task of teaching on-line. //