The link below is to a New York Times page with various "year in reviews" along with ideas on how to use them in the classroom. Here are a few of my own Web 2.0 uses
Tripline- Have students map out the various events in the retrospective using information and multi-media.
Bubbl.us- Students can map out events; arranging them and identifying the connections between events
Chartle.net- Have students conduct polls among staff,peers, and adults regarding their opinions/feelings about events and then create graphs using the program
I just used Wiffiti for the first time as part of a AP US History class discussion for students to post questions or comments that didn't want to interrupt someone else. First it doesn't work from every phone, only smart phones apparently (my dumb phone couldn't get a message to appear). Also the messages move around randomly which can be distracting. If I use this again in this way, I won't project for the class to see, just put it on my laptop for me to see during a lecture so that I can address student questions and comments for students who don't want to interrupt or speak up (But am I enabling their silence?).