There is no written evidence that you are exactly who invented the phrase educational technology. Different teachers, scientists and philosophers were at different times different definitions of educational technology. Technology Education is a multifaceted and integrated to evaluate those people, processes, ideas, equipment and organization, where to implement the technology used in various fields of science only by the needs and requirements of education, and manage solutions to these problems in all aspects of human learning.
Educational technology, generally speaking, has gone through five stages.
The first stage of educational technology is the use of aids such as charts, maps, symbols, models, patterns and concrete materials coupled. The term educational technology has been used as a synonym for the audio-visual.
The second stage of educational technology is associated with the “electronic revolution” with the introduction and implementation of hardware and sophisticated software. Use different visual aids such as projectors, magic lanterns, tape recorder, radio and television has a revolutionary change in the educational scenario brought. Consequently, the concept of educational technology against these sophisticated instruments and devices for effective presentation of the materials had been taken.