Last night my son sent me a text message asking me to edit a paper for him. He is a freshman at the University of MN. We used a program by Microsoft called SharedView that allows us both to see his paper at the same time; I could highlight sections that I thought needed rewording, or make spelling corrections myself to his paper; I could see the changes he was making; and we could chat while working. It requires a fast internet connection on both ends, but it is quite nifty.
It just doesn't seem all that long ago when I was typing college papers on an IBM Selectric.