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Communication
technologies are generally categorized as asynchronous or synchronous.
Asynchronous activities use technologies such as blogs, wikis, and discussion
boards. The idea here is that participants may engage in the exchange of ideas
or information without the dependency of other participants involvement at the same
time. Electronic mail (Email) is also asynchronous, that mail can be sent or
received without having both the participants' involvement at the same time.
Synchronous activities involve the exchange of ideas and information with one
or more participants during the same period of time. A face to face discussion
is an example of synchronous communications. Synchronous activities occur with
all participants joining in at once, as with an online chat session or a
virtual classroom or meeting. Virtual classrooms and meetings can often use a
mix of communication technologies.


The term
eLearning 2.0 has been used to refer to the user of social software such as
blogs and wikis. This approach has been particularly evangelized by Stephen
Downes who runs the very popular daily blog and newsletter. In many models, the
writing community and the communication channels relate with the E-learning and
the M-learning communities. Both the communities provide a general overview of
the basic learning models and the activities required for the participants to
join the learning sessions across the virtual classroom or even across standard
classrooms enabled by technology.

Many active ties
essential for the learners in these environments require frequent chat sessions
in the form of virtual classrooms and/or blog meetings. The various blogs that
are being used for providing writing approaches are gaining popularity.
Advantages and Disadvantages A growing number of physical universities, as well
as newer online- only colleges, have begun to offer a select of academic degree
and certificate programs via the Internet at wide range of levels and in a wide
range of disciplines. While some programs require students to attend some
campus classes or orientations, many are delivered completely online. In
addition, several universities offer online student support services, such as
online advising and registration, e-counselling, online textbook purchase,
student governments and student newspapers. E-Learning can also refer to
educational web sites such as those offering learning scenarios, worksheets and
interactive exercises for children. The term is also used extensively in the
business sector where it generally refers to cost-effective online training.
Key advantages of E-learning are flexibility, convenience and the ability to
work at any place where an internet connection is available and at one's own
pace. E-classes are asynchronous which allows learners to participate and
complete coursework in accordance with their daily commitments. This makes an
E-learning education a viable option for those that have other commitments such
as family or work or cannot participate easily e.g. depending on a disability.
There are also transportation cost (and time) benefits with not having to
commute to and from campus. The cost benefits of E-learning to large corporate
organizations are difficult to ignore. When using E-learning to train users of
corporate computer systems, normally achieved by way of simulationbased
learning content, the learner finds himself in a software environment that is
exactly like the real one but which does not carry the same error risk.

Unlike classroom
training, users may repeat the E-learning course without duplicating the cost.
It is commonly accepted that the initial cost of an E-learning implementation
is expensive (once-off development cost), but that the cost of training (per
user) goes down exponentially as more learners use the Elearning course
material. When using E-learning simulations to assess learning progress, the
instructor is assessing the actual competence of the user to perform a transaction
and not merely knowledge of the system. Other advantages of E-learning are the
ability to communicate with fellow classmates independent of spatial distance,
a greater adaptability to learner's needs, more variety in learning experience
with the use of multimedia and the non-verbal presentation of teaching
material. Streamed video, recorded lectures and MP3 files provide visual and
audio learning that can be reviewed as often as needed. For organizations with
distributed and constantly changing learners (e.g. restaurant staff),
E-learning has considerable benefits when compared with organizing classroom
training. Disadvantages of E-learning include the lack of face-to-face
interaction with a teacher. Critics of E-learning argue that the process is no
longer "educational" in the highest philosophical sense (for example,
as defined by RS Peters, a philosopher of education). Supporters of E-learning
claim that this criticism is largely unfounded.

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