If you have a company like Inspirica near you, they will give you D 2 full practice tests to see what test will give her the best results. Obviously, start with the SAT. Or you can give her a timed test yourself. It must be timed. Hire a tutor if you can afford it, or use Khan Academy for free. We used Inspirica, because my D’s school recommended them and they were incredible. Very, very expensive, but D got good results. They did not waste time on material D already knew and focused on those areas whe would get the biggest bang for the buck. With my S, we did it on our own, but he and I worked well together. D worked better with a tutor.