Virtual Communities
A great example of these communities is the Melton Vale VLE which is a big community where people can access work from others and they complete sheets that need completing, these are important because it allows a group of people to access information, also forums can be like this where people have a question and someone with the knowledge can answer it. One of the downsides to this is that you cannot rely on the information you are given, and you don't know who you are dealing with.
