Can you add categories to pages?

I am trying to establish a blog for a presbytery — a district of presbyterian churches. Many of the folks in the presbytery are older and can barely use their computers. they can’t seem to “see” the categories, or understand how to sort posts by multiple authors by using them. Nor do they understand how to flip between different blogs by using a blogroll.

So I was experimenting with setting up separate pages for the various groups: General Presbyter, Associate General Presbyter, Rwanda Partnership, Disaster Assistance Teams.

These pages, of course, are designed to be static, and therefore assigning them to categories and adding tags doesn’t seem to be available.

Is there a way to make the various pages fully functional as posts? Or does anyone else have good ideas on how to have multiple bloggers, one blog, and organize it so that non native users can figure it out?

thanks!