Storify allows you to create stories using social media sites. I use it to archive edchats from #7thchat.
The most valuable resource any teacher can use is Twitter! I have three accounts, @rondorland, @mrdorlandsclass and @7thchat. I have gained and shared more on Twitter than on any other platform. It is a great way to communicate classroom happenings as well as connecting parents and classmates. All teachers MUST use Twitter.
Prezi is a wonderful tool to organize ideas, thoughts in a non-linear way. Students in my class have used this site to create presentations on "Out of My Mind", organize ideas to Lucia (our sponsored child) and for many other every day activities. I have also used Prezi as an alternate way for students to express themselves. An example of this is using it to summarize, analyze and relate to comprehension exercises.