... example, with two-way videoconferences, students interact with live video of an instructor. Other example of synchronous technology is telephone conversations. Asynchronous delivery does not take place concurrently. In this case, the instructor may record the instruction in form of video, audio or website, and the students reply at some later time. For example, students receive instruction from a web-page and respond by writing e-mail messages. Distance Learning is increasing day-by-day in schools and colleges. International Data Corporation (IDC) wrote a research paper "Online Distance Learning in High Education, 1998-2002", according to which, there is a compound annual growth rate of 33.1%, with a projected 2.23 million students by 2002. IDC also predicted that about 84% of American colleges and universities will have established technology-based distance-learning programs by 2002. Following table shows the prediction of the number of two-year and four-year schools in the United States having distance learning programs for some ...

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