I know that there are a lot of online schools that aren't considered legitimate or particularly good. What schools have you all had good experiences with, either for a degree, certification, or just courses?
I don't have any personal experience with them, but the schools that I've seen get the highest rankings are University of Phoenix, Kaplan University, and Liberty University. As with other schools, it probably depends on which discipline you're considering.
I don't know about Kaplan and Liberty but I really don't consider Phoenix to be a reputable school. They do offer degrees but they are viewed as more of a degree mill than a school and many don't consider it to be a real school.