Study from different sources because one may not be right for you. But there is something out there that will help it click for you. I bought a book on Amazon for the teasv. I used utube and the Khan academy. Plus my son let me borrow some great school books that he wasn't using. I got some books from the library. I downloaded as many apps as I could find. I did it all. Make sure you are taking the practice tests. I also did different sources for the practice tests too. I think on the science I learned more than I needed too but it will all be a good foundation for when I start my a&p this summer. Good luck to you!