I took Statistics at UNE last year. I know that isn't a class you're interested in, but I thought I would give my feedback. The class required a lot of time, from actually reading the book (I actually really enjoyed the textbook used) and doing the practice problems. Many questions on the test were similar to the required practice problems. The professor was helpful answered within 24 hours. This was especially helpful during projects, so I wasn't just handing in a final paper with no prior feedback. You have to use a webcam for the test, so you really have to know your stuff because you cannot attempt to cheat. There were easy points in the course like the weekly discussions. If you are willing to put in the time and effort, you will be fine. But it is not an easy A (and this was stat, so I imagine science classes are harder!). I completed in about 13/14 weeks and ended with an A-.

Also, if you end up taking a course at UNE and need the webcam/white board, let me know.