Menofalls.com is the education site that I have used with my students for many years now. It's an older Joomla site because it's on a free server donated to education. Therefore, I cannot use it as much as I used to, and I have found Google Sites to be better for education in many respects.
I have a social networking system built in (Community Builder) that allows students to post blogs, write in the forums, and create a Linkedin-like profile for themselves. This was the beginning for me of teaching without a copy machine, with all student resources, assignments, and work on the site.