This is a great product developed here in Australia by the University of NSW, College of Fine Arts (COFA) about 5 years ago. http://omnium.net.au/
I like their metaphors for the different spaces. Each student has a “filing cabinet” which is their personal files.
To share these they “publish” them to “The Wall” which is a shared gallery space for the equivalent of your workgroup/workspace, where you can add comments. This works best when the files are images or video (which is what it was designed for, developed by/for the College of Fine Arts.) Then if the teacher thinks your work is great, they can publish it to a “Class Wall” for the whole class to see.
The best work in the class can be published to a Public Wall, ie a virtual art gallery space that anybody can view. Great promo/marekting for COFA.
Would you like to be able to promote your student work in this way? With their permission of course…