Will advanced knowledge help my undergraduate research? Possible Duplicate:
  Overlearn in undergraduate College- good or bad idea?  




I'm about 0.5-2 year(s) ahead of my course plan* depending on how you see it, but I don't want to waste my time so I want to self study stuff beyond my syllabus. I'm a Physics major freshman now, and I plan to get into research in my sophomore.

Let's say I have self-studied lots of Math/Physics stuff in my freshman year, and get into research in my sophomore. Will knowing advanced stuff give me an advantage in my research? (one of) My goal is to have a good grad school application

Here's a related question I asked previously on overlearning in college Overlearn in undergraduate College - good or bad idea?

*I was preparing for Olympiad so I learn Calculus and Introductory Physics. But I don't get to skip courses in college. So I'm relearning stuff all over again.
I can't think of a single situation where having more knowledge than expected or required was ever a bad thing...

You will have to "suffer the system" here and there, that's a sad but simple fact (just because you say you know something, does not mean the schooling system will believe you. Nor should they--truth be told, most of the time you actually do learn something from courses you thought you mastered). 

Anyway, always talk to your teaching assistants/professors about this. Work them a bit, see how flexible they can be. Often, you'll find that some could not care less if you come to class or not, as long as you pass the exams and do all the practical work required to pass the course. Others, unfortunately, will have mandatory attention and the likes, that they consider holy. Going against them and their reules at all costs is pointless and will cost way too much time and effort. Just sit out the classes. 

In time, and when your approach is indeed successful, it will get easier and easier to pull off. 

Whether it's a good idea or not, that depends entirely on how fast you can learn. No matter how good it might make you feel to know so much more than your peers and to be able to skip so many classes, and get into such high-profile research, the time you spend studying should never cost you your social/networking/extracurricular life. In time, the stuff you'll have to master will also become harder and harder to learn. Before you know it, sticking to this approach blindly will cause you to you spend all day and all night, all year round, in some dark corner of some smelly attic. And that, is never a good idea.