Web techology uses fairly inexpensive equipment that is easy to obtain.

It can allow the student to decide when and how fast to cover mateial and to review material.

Topics that have samll demand can be published.
The use of vision; sounds; and interaction re-inforces learing as does quzzing and instant feedback.

Vidoe conferencing or TV broadcasting is expensive; is at fixed times and is not easily reviewed. The pace is fixed. It is limited to courses with broad appeal.

Reduced cost and consisten message since the material can be used world wide and does not depend upon a local teachers presentation.

interactive internet video conferencing allows high demand or speicalized instuctors to teach to small or large numbers scattered across globe with need for travel.