Tutors might also be discouraged by unsuitable software, ill prepared roles and badly planned collaborative framework. However, many of us have not been exposed to techniques for guiding collaborative learning, especially in an online setting. Learners and trainers are not likely to change their attitudes as swiftly unless they are trained in CL techniques. A number of methods exist to facilitate communication between individuals and groups via these networks. Effectively, this means that some 15 million people are accessible to one another instantaneously and without regard for distance.
Some lists provide a single address for mail that is to be forwarded to every member of the list.
The largest of these lists have as many as 15,000 subscribers located all around the planet. Conferencing systems, information services and BBSs fill out the range of virtual communications. These systems share a great deal in common, differing mostly in terms of size, commercial status, and focus. These systems tend to be centralized, that is supported by computers at a single location although accessed by computers all over the world. Conferencing systems focus on providing the tools for the facilitation of discussions.