Correspondence in the case of distance learning would be any instructional material in a printed format which has been sent to the student. Why is correspondence or the printed word still the medium that is most commonly used? Its probably because once the materials have been sent to a student, he can read it at his leisure anywhere. He does not need to be near a computer or a phone and doesnt need to be Internet-connected. If there is supplementary material sent, it is usually meant to enhance and add to the printed material. This could be in the form of audio or video tapes, CD-ROMs or DVDs.
How exactly is this correspondence put together? It takes quite a bit of doing to put the material together. First of all, theres a lot preparation involved. Some person who is qualified to do so has to put together the document which has to go out to all the students of that particular course. The person who puts together the document has to do the research for that particular topic, collate all the material and assemble it into a document, image or a chart. After the material is put together, the final version is duplicated, packed and sent off to the students for whom this is...