Study.com testimonial

[tallpilot]

Everyone studies differently but I would suggest that once you complete the quizzes if you don't feel ready for the test then take a practice exam. Then you will get a list of lessons based on the questions you missed. Targeted studying should be faster than trying to rewatch the entire course.

I do take the practice test after I do all the quizzes to see where I'm at.  What I find is that I tend to hit a wall and no matter how many times I take the practice tests, I don't improve much.
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Understood.  There is a little disconnect sometimes between the questions and the material.  The lessons are authored by several different people and the tests written by someone else.  I have seen a few questions that were wrong and a few where the answer was nowhere to be found in the lessons.

If you are trying to master material using Study.com I fear you will have an unsatisfactory experience.  If that 'wall' you are referring to is greater than the level you need to pass the exam then I suggest you just take it.  The goal here is to get credentialed.  If the material turns out to be important to your employment or you simply have a passion for learning there are better sources for more in depth study.  Right now you are on a clock and the faster you go the cheaper it is.

Now that advice would be different if you are transferring these courses somewhere where the grade isn't pass/fail.  Then there might be some benefit to getting more than a 70%.