Educational technology includes all educational resources --- men and materials, methods and techniques, means and media in an integrated and systematic manner to optimize learning. Learning not teaching is the crucial task of the educational process. Technology is one component in this process and can help make learning easy and interesting. A large number of schools have gone headlong into computer education --- not really computer-based education --- and usually what this means is learning how to use a computer for different tasks, including mathematical operations (statistics, spreadsheets, geometric modeling) and desktop publishing (bringing out a class magazine or making posters). Computer-based education, on the other hand, implies the use of computers as a means to educate. Lessons are designed using the capacities of the computer to stimulate, organize information, and present materials that are visual, auditory and text-based, all within the same frame. Such computer-based ed...