So essentially I would like to add a menu link to NukeNAV called Teachers that links to a page but when you mouse over it in NukeNAV it does a flyout that lists links to each teacher's individual bio page.

So my question is how do I add a new menu link to NukeNAV with flyout links.

This post will help you
http://nukeseo.com/modules.php?name=Forums&file=viewtopic&t=416

For the fly out links, I'm assuming you need a second level so you should be able to do that by nesting a new UL series - use the exisiting code as a guide.