Beck has a great song about himself and some of his friends getting in trouble when teenagers. It's written in a 'traditional' style. It's very funny. You might try learning it as the sarcasm is ruthless and the settings are pod malls, McD's, 7/11's and the like. Very relevant and would make a good ice breaker. I've posted before about having a fun band with my nephews. We've developed a broad repertoire over the years as I've made an effort to adapt songs from their referencing to fit what we do. They in turn don't roll their eyes when I break out a Marty Robbins song. I realize you're making an educational presentation and most of the stuff we play is pop music or 'alternative', but maintaining a 'students' attitude towards material and searching out songs by rap artists or new singer/songwriters is a great way to keep music fresh. Good luck!