Since your students all play with their cell phones in class why not allow them to be engaged in the conversation with a live poll.

Its as simple as asking your youth a question, have them answer using sms text message, twitter or the web.  You can then see and show your real time results in powerpoint or browser.   Thanks to a great service called Poll Everywhere.

Oh yea – it can be FREE if have less than 30 participants in the poll beyond that there are small monthly charges for larger groups.

http://www.polleverywhere.com/