When i go to my site, even though I am not signed in... I have access to all content. Is there a way to lock down pages unless people are logged in?

Every pages is able to be opened except profiles.

the only pages that should be allowed to be seem without logging in is:

FAQ's / Privacy
Contact Us
Classmates

Please advise.

If you go into Edit pages, where you see the list of all of te custom pages, you can check the box that says password protect...then, the only people who can access those pages are classmates who have signed in. You can also add a special password to allow others in, who are not classmates.

Try it out with one page to see how it works. Good Luck,
Jim