User updates of site?

[Nick 568]

Hello, I am currently the webmaster for my team, however, there seems to be a lack of communication between me and a few members, especially the sponsorship group.
What I'd like to do is have the site set-up with a log-on to where users whom I give a user-name/password to can go in and edit the text on certain pages, and maybe even add images and links to some pages.

So my question is, is this something that's possible to do? If so, how?

I realize I could probably just install blog software on the server, but for obvious reasons, that's not the most desirable. I could also just have the html files to select pages on a network location at school, but then I know some members are not going to be comfortable going through and editing the html manually in notepad...

Any help is greatly appreciated, this year was my team's first "real" website, and my first experience making a website, so I'm still somewhat new at this.
Thanks in advance!!