by Jose Navas.
Thanks Colin,
I think that maybe the administrators and teachers only could add this resources, in this way the security of the site would not be compromised.
Students contributions can still be available in the course's activities, maybe a teacher can choose the best contributions and those become available outside of the course in the front page (or another learning unit, which name we have not decided yet ).
Better yet, both fellow students and teachers can vote (+1) on the best resources and the ones with most points will get to the front page of honor.