Greg wants to teach his mother how to use a computer, particularly how files are organized. He's been thinking of using Udemy to learn Dos. Leo suggests pointing her towards YouTube. There are likely videos online that are just as good. But Greg would probably want to get that first. Also, check out AARP's online computer classes. There's also Kahn Academy.
The internet has always been an incredible resource for information, but if you're motivated enough, you can take that a step further and get a free or inexpensive college education. MOOCs, or "Massive Open Online Courses," are real classes that have been made available online from schools and universities. Many of these courses are free, but if you decide to pay, you can actually get a certificate of completion or a MicroMasters from it. Here are some of the places you can find these MOOCs:
Terry wants to know if there's a way he can get a discount on Lynda.com. Leo says he can get a free trial, but isn't sure about a discount on it. Leo recommends checking out iTunes U, since there are a million free courses there, many of them from universities. For casual use, he should start with iTunes U and Kahn Academy. Another option is to look for tutorials on YouTube.