Which Study.com plan did you pick?

[collegechick]

You do not have to purchase anything addtional when taking a SDC course. The exceptions are a few literature courses (where you are expected to acquire books from a given list, some of which may be free and in the public domain while others will cost money) and the science courses with lab where you are expected to purchase a particular lab kit. Math courses may expect (but do not require) a calculator. You'll probably make your life easier, however, if you do have a good allowed calculator to use.

Some SDC courses are easier than others. For instance, discrete math is, apparently, one of the more difficult courses. Others can be finished in just a couple of days. Check the review thread to see if the courses you're needing to take have been reviewed there.

Thank you.  Fortunately, I'm all done with math.  Need to finish 12 UL's, American Government, Intro to World Religions.  So, if I use Premium Edition, what is the additional fee to test?  Or do I have to switch to the Accelerator option to test?

You must switch to the accelerator option to test. 

If you need government, InstantCert is going to be a cheaper option for you. $20 + proctoring fee.

Thank you!  : Checking them out now