The document provides a history of educational technology from ancient times to the present. It discusses how early technologies like the abacus and textbooks helped transmit information. Over time, technologies like film, radio, television and computers were incorporated into education. Major developments included the introduction of mainframe computers in schools in the 1950s and personal computers in the 1970s/80s which allowed technology use to expand. Current trends include increasing computer usage and the rise of the internet to facilitate communication and access resources.