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As it is an expensive material, it was only available for the nobles of Ancient Egypt.
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There were major use of oral instruction in Ancient Greek.
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According to the Bible chiseled stone is used around the 7th century BC.
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Even if it was not available for public, writen documents come to existance in fifth century BC.
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Slate boards used in india by the means of education around 12th century AD.
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Invention of printing press made written materials available for public.
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Blackboards or Chalkboards are intruduced.
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In other name distance education had became popular due to the developments in delivery systems.
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First usage of radio for educational purposes dates back to 20's.
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Overhead projectors are adapted to education from military.
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Televisions spread and dissapeared rapidly in the field of education as it forces teachers to adapt a passive role in classrooms.
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Audio-conferencing is used in order to support other medias since 70's.
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Experimented in 1954 but used in 70's with an behaviorist approach.
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Video-conferencing is used with its own dedicated cable systems and conference rooms.
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Electronic projectors and some softwares such as powerpoint are used instead of Overhead projectors in 90's.
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A decrese in the cost of video servers led to the first debut of Lecture capture systems.
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Social media is a tool of communication which let people to interact with each other and it is also widely used in education.
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