Educational technology is also sometimes known as EduTech or EdTech. We can trace back tools that have helped children and people to learn in more accurate, faster, and easier ways to the emergence of paintings on cave walls! However, it was not until the early 20th century that we saw any sort of machine in operation. These include the likes of the Gestetner stencil devices and the mimeograph, which were duplicating machines that were designed to create short copy runs – usually between 10 and 50 copies – for home or classroom use.