I love online classes. Since I live in a rural area and work full-time w/3 kids, it gave me the oppourtunity to knock some of those pre-req's out of the way at my own pace. I have taken Eng Comp, Nutrition, Human Growth and Development and Agebra and gotten a 4.0 in each of these.
There is a rhythm to every class. You have a calendar and usually it's the same thing every week. You have one or two chapters to read. There will be a discussion topic or questions to be answered in the discussion area that have to be posted by, say Thursday and you have to respond to other peoples posts there for a participation grade. There will usually be a short quiz that will be due by maybe Friday. The exams may be over each chapter or 2-3 chapters put together.
Online classes don't get so much in the way of life. You can put your kids to bed at night and then sit down to do your work. You can get up early in the morning and get it done. And lets not forget, everything is pretty much open book. Just stay on top of that calander.
I just completed my first quarter of Nursing School
and I took the Human Growth and development online, in addition to my Nursing classes at the college. Worked out really nice. The online classes were even cheaper for me, than the classes I attended. Figure that one out. I really encourage you to do it.