I am a senior in high school and I am getting ready to take the SAT test. A lot of my friends are taking classes to help them study for the SAT, but they are very expensive, and I really can’t afford to take them. I have bought one of the study guides from the book store, and I have been going through it reading it and taking practice tests, and I seem to do really well on them. Do I really need to take a class to prepare, or is working on my own like I am doing going to be good enough?