Quora is a website where people ask questions. It seems that it is growing in popularity. Some talk about pinterest, however, with the wiki-type of answering system, this slick way to ask and answer questions is going to be a platform that becomes familiar. This information is how to get started on Quora. This is the kind of website educators seem to be getting into.
The edubloggers group is a pretty active one on Linked In. I used to moderate this group but opened it up in February for anyone to join. Right now the flipped classroom discussion is the most active conversation as people talk about tools.
This website is a fanfiction program for secondary students. This may be a fun activity for summer.It is based on the "band of heroes" framework. I think that more fanfiction type activities will arise.