Hi there! I'm currently taking Bio 156 at Rio I've got a B so far. It's true what everyone says, there is a lot of reading and writing involved and also the lab and the lab report you have to turn in every week. Some weeks you have a lab, an online quiz (open book) and an essay to turn in. Some weeks just 2 of those three. So far I have only had one week where I only had one assigment.
I am taking the 16 week course, I don't think I could manage doing the 8 week. I studied like crazy for the midterm they will not pass you if you do not get a least a 62 in each the midterm and the final, even if you get A's in all your other work. And when you get to the mid point and have to study 8 chapters, it can be overwhelming. I was putting 3 to 4 hours a day for a week and got 80%.
I have 2 little ones that keep me busy all day, I manage to get at least a couple hours of reading during the day and try to get another 3 hours of work done after they go to bed.
If you are self disciplined about your study schedule you'll do great. I think the biggest enemy of online learning is procastination. My instructor is pretty specific about what she wants especially when it comes to writting she gives really good feedback too, and is always checking in with you, so far it's been good. But I have seen on the forums people droping the class becuase they really do better with the class room enviorment.
I hope this helps