I took the Live Lecture Series for Step 1 and used the books as my primary study source. After reading those once along w/ the lectures, I started doing the Q-bank questions all day and used by HI Yield books if I needed further input based on questions I had missed. The explanations given by Q-Bank were quite thorough for most questions. If I had it to do all over, I probably would have just read all of my Hi Yield books once, then continue to go over First Aid at least 3 times, and do Q-Bank ?s the rest of my time. This would have been definitely enough for me to score well. Good luck. --BeeGee