Well, here's the site that made me learn a little about CSS to fix a few issues. Hooray!
It's still a work in progress, and a few things (like forums/community/teacher pages/etc...) are installed but disabled while we discuss whether or not we want them - and you'll notice the online side of things is pretty heavily under construction.
A few things I can suggest:
1. The Header is too wide and not tall anough.. Maybe make the header area's height bigger
Or make the Header smaller and add some of your menu items to the top right like the demo...