Physics Help/Tips: Optics?

<p>In my physics class we're doing optics right now-specifically lenses-and last quarter I got a B+. I'm going to work really hard this semester to try and get an A, but does anyone have any tips/good websites/etc. on optics? Should I do more problems, focus on formulas, or what?
Any ideas?</p>

<p>bump
10char</p>

<p>Free bump. Our class is doing Optics also right now.</p>