1. Introduction
In the last two decades we have been observing very impressive changes in the way technology is used in education. These changes have been possible parallel to the innovations made in the business life style: the customer is now at the centre of all activities [1]. From an “instructor centred education system” approach, emphasis is now shifted so as to give priority to learning. As a consequence, today a “learner centred education system” has. been encouraged that requires instructors to be more involved with motivation of the learners, rather than the transfer of information [2].