I have a friend that was taking a test every week, and didn't have to retake any. He would skim through the chapters, then really focus on the end-of-chapter questions and rationale, then use the SG101 for the same section. When he was finished with the entire nursing component he would take practice test A, see where he was week in, focus on those areas, take practice test B, focus on the week areas again, then take the real exam....but he has a lot of experience as a Paramedic and medical in general, so I guess he had a little advantage..