Does a simple explanation of group theory exist?

[faumember89]

Hey guys,

 

I had a couple lectures on group theory this week, but it's only an undergraduate inorganic chemistry class and the whole concept is very abstract and hard for me to grasp, specifically once I get past the basic operations. I understand the basic applications, how to calculate the number of vibrational modes for nonlinear and linear molecules, but my problem is explaining and interpreting character tables. I don't understand what the A, B, etc. are, and I have trouble calculating their values.

 

So my question is, does anyone know of a good resource on the web to assist me? I've looked for some but I was hoping someone on here knows something that has helped them or is just in general very good.