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The significant characteristic of this computerized learning medium is interactivity. This characteristic enables the users of computers to modify, change and manipulate the on screen objects. The software programmes are designed to allow such manipulations by the users. Computers that are connected to the internet provide users with an opportunity to communicate with other users across the world. Moreover, the developers and researchers of computer – based education are chiefly concerned with three major aspects involved in interactivity. First, support provided for online learning courses. Secondly, the opportunity of interaction with the content and learning material available online and lastly, the ability of the learners to access, manipulate, synthesise and communicate content information3.