Trello - Trello provides a space to categorize resources, collaborate, and share.
Skloog - Categorize resources and share in a visual way
Tweeted Times - curates content and presents it in various forms
Students can benefit from collaborative spaces where they can share and build upon the ideas of others.
Padlet - Posterboard to place comments, videos, articles, and more
Example: for Response to Multi-Genre Pieces at http://padlet.com/wall/i9vbix8iim
Lino.It - Post-it notes for organizing thoughts
Example: Chapter Reflections
Coggle - Creative notes and collaborative mind maps
The CDTL Brief outlines how a teacher moved his discussions online with forums and has examples of student posts and reflections.
Flipgrid - Audio and Video collections
Other Resources Include:
One example of pooling knowledge comes from the way we watch television. The "water cooler conversations" about shows from the previous night entail piecing together information, making inferences, and predicting outcomes.
Here is an example from Downtown Abbey about a controversial figure. On this wiki site, anyone can post videos, begin discussions, and contribute to the knowledge base about the show. If you like the idea of wikibuilding in a public space, here is a piece on making a page in Wikipedia as a class. In a more closed setting, Wikispaces might be more appropriate.
In the world of current events, crowdsourcing has become very popular. Here is an article about crowdsourcing from Wired magazine. In this TED talk, a reporter talks about crowdsourcing and the news.