I think one of the best ways to incorporate mobile technology in the classroom right now is through Polleverywhere. This service offers online polling where the students can participate in several different ways, including: sms text messaging - via the web using their web widget mobile device by visiting twitter a smartphone interface Polleverywhere is clearly growing, as the 3rd option that I mentioned above is a new development. I just tried it for the first time using an iPhone and it worked very well.