QUOTE(Jared @ Sep 12 2011, 06:58 PM)

Feel like crap right now.
My teacher talked about how everyone is so narrow minded, only being able to see what they're told. It felt so out of place in class today. I feel crushed, terrible, and know my narrow mind-ness can't be changed. I just want to cry.
I feel like the stupidest person in the class, just sitting there, not understanding. I probably am the stupidest person there.

Ignore this if you want, but I'm curious. Was the teacher speaking directly to you? If so, s/he's a dick. Also, do you actually feel as though you are narrow minded? Open mindedness would be not necessarily agreeing with people, but being able to understand or at least respect their views and who they are. The two terms have nothing to do with actual agreement or disagreement on any thing. At least, that's how I see it. You may have no need to work towards open mindedness, as you may have not fully understood the term, or your teacher may be narrow minded her/himself and falsely accused you (and everyone else, by the sounds of it). But if you do truly feel as though you want to be more open minded, you only need a willingness to do so.
In regard to not understanding, you're not alone. Physics 11 is a b****.
Lastly, listen to ShadowTiger, those truly are words of wisdom.