Ask the school newspaper to run an article about it, or possibly have them write articles that wouldn't normally have space for an on-line version of the newspaper. Create some pages that the students would actually use. These could be research pages or career orientation pages. Try to be creative and promote as much as possible among students 3. It's a long shot but tell your local paper about the new site.
Newspapers love students doing things with technology.
This will boost your site into the full view of the community. However, make sure that your site is fully presentable when you do since it will be under heavy scrutiny. Every web site will run into serious problems sometime. Administration will catch you on most of these. I provided a brief sampling of problems you will probably run into.