Hey Kerri,
I understand where you are at with the "confusion". I have brought issues to the table with different answers such as math and such. At first it was discouraging to find these things in what you are supposed to be learning from. Now, I have been using them as proving grounds to reassure myself that what I wrote or did was right and that you retained what you read. Keep at it and if needed you can always ask. I am at the end of Unit 4 (Just struggling to find time right now. Vacation, training for event, family, home projects, work projects all hit at once.) So, not too far behind you.
Dan