The Sloan Consortium monitors Online schools and online education available cross country . This association is an institutions or organizations that promotes the online education quality through the sharing of knowledge to both program students and providers.
The following statistics from one of their latest publications,
Growing by Degrees: Online Education in the United States 2005. This is outline recent trends in online education based on teaching information, enrollment numbers, and growth predictions for online degrees.: Several interesting facts:

1. Sixty-five percent of higher education institutions report that they are using primarily core faculty to teach their online courses compared to 62% that report they are using primarily core faculty to teach their face-to-face courses.