A survey, presented in looseleaf handbook format, reviews a number of ideas about educational development, technology, change, and the improvement of learning. Its primary focus is on the situation in developing countries. The materials presented are largely descriptive--going from theory to planning, and then on to case studies of educational technology in action today. The case studies are of El Salvador, Niger, American Samoa, and more briefly Mexico, Colombia, and Singapore. The results of El Salvador's experience in educational reform using instructional technology are the basis of some projected cost estimates. Sources of information and assistance on educational technology in many countries are listed, and an annotated bibliography of books and periodicals is also provided. (JY)