For multi-perspectives on Teaching Resources I could imagine something analogous to http://www.thesinglesjukebox.com/ with panels for different subject areas. This would be a candidate for the "curating" model - the site generates a list of the year's greatest hits. (This year's top song so far is quite rightly Janelle Monae..but note that one reviewer only gave it 4/10)
A curating committee needs to have a diversity of members: The Singles Jukebox produces scores for each song, but different reviewers sometimes vary wildly in their assessments, most importantly, explaining why. With social media, there's always a washback effect (think of it as a feedback loop) on users - so society needs to be very wary of systems where people just give "likes" or "retweets" without any criteria. The monopolar "like" button is just a way to automatically give prominence to the most simple-minded reactions.