> Does anyone know how to set up a tikiwiki to require a password(s) to even view it?
Admin > General > General Settings > Disallow access to the site (except for those with permission): V
> Or, perhaps better, to allow a password to view a certain section of it?
Use category permissions (tiki 1.9.x)
> I'm a tikiwiki newbie, and would appreciate the quick help.
> I've set up a tikiwiki for teachers in my school district to use, and don't want to let them down.
Welcome again to the bunch of educators using Tiki for edu!
Please, as soon as http://edu.tikiwiki.org is up again (unluckily it seems to be down since soon ago), register also there and drop some lines about your case of study, interest, etc.