Admin Forum:Need help with Categories ...

I understand and don't understand categories and am having a hard time figuring out how to make them work on the RAOGK site. Basically, I think two major categories would be US and Int'l?

Then, using a stale like Texas as an example (a state that has 10 pages) ...
 * USA would be the parent level (level 1) category,
 * Texas a child (Level 2) category, and each
 * Texas page (Texas02, Texas03, etc.) a grandchild (Level 3) category?

Ok, if I'm right about that, then how do I code it/create it?

Could someone visit the site and possibly leave me some sample code to get started on my categories? (I.m not asking anyone to do it for me. Just some sample code ... I'll learn by doing the rest of it.)

Do categories require a page? This is part of what I don't understand about categories ...

Then how to I assign the USA category (for example) to each of my state pages?

I'm confused ...