This document summarizes the history of audio and video recording technologies used in education from the 1970s onwards. It discusses how inexpensive audio and video cassette recorders in the 1970s allowed teachers to more easily record and store their own teaching materials. Early formats discussed include audio cassettes, reel-to-reel video and audio recorders, and various video camera models. The development of video cassette recorders in the 1970s further reduced costs and barriers to classroom video recording. However, video technologies saw less usage in schools over time due to issues like tapes only being requested by some teachers and rarely edited for new lessons.