The book ‘from audio-visual aids to educational technology’, symbolizes the evolution and development of Educational technology and covers the journey from the traditional graphics and in-expensive teaching-learning aids. It depicts the setting up of audio-visual education cell in the Ministry of education, Govt. Of India in 1948 and the establishment of audio-visual education units in the state departments of education, with the audio-visual education officers as their heads. The book highlights the beginning of the telecast of Educational television programs through the satellite for the first time in 1975–76 in nearly 2400 villages of 6 states time and the Indian Education satellite known as ‘satellite for education’ in 1981–82 was exclusively devoted to educational programs. - Prof. Harmesh Lal.

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