Comparative Analysis between A-synchronous & Synchronous Technologies

The essay has to cover a comparison of 2 A-synchronous (Horizonlive, Centra
7) & 2 Synchronous ( blackboards, Webct) based on the information on web
sites and a personal participation at the demos.


The comparison will be based on the following criteria:
General aspects
Purpose of the system
Technological view
System architecture
Technical features
Pedagogical view
Pedagogical concepts
Possibilities for collaboration
Role of instructor
What are the key strength and the key limit of the system?

Here are some demos to help you with research.