First Aid has taken all your highlighting and stuck it in one book. If it helps you for class, fire away. I wouldn't bother with the other sources for Step 1, though. You won't have the time you'll need to pull it off, and there are most likely discrepancies between what you'll need to know for class and what's on the boards. There's also the issue of you potentially tossing out important info as junk and vice versa.