We need a few PSDs. Most of them will be nearly identical (header, sidebar, etc.) except that the contents of the PSD will contain what we need for different pages.
The header should contain a logo, a login button, perhaps a search field, a button inviting people to click for live help, and a top menu.
The sidebar should contain a side menu (for subsections), a sign in box, a button inviting people to view a demo of the virtual classroom, and a button for international students.
For a breakdown of the PSDs, please visit the extended requirements section at http://giggiti.com/extendedreqs.php. We tried to be as specific as possible to minimize revisions.
If you don't want to do so many PSDs, just make a splash page, a text page, and a page containing the elements of those other pages (i.e. a table to compare products & a box to display hw)