I started looking at some things that were successful last year. If you have the time, look through some of the TED videos that weren't part of our work in this program. If you want a great one that I showed to my students, here it is (a little more than 9 minutes).
The way I used it with some of my students last year is I asked them what they thought was the most important invention of all time and why? Then I showed them the following video. It would be a great way to start the year!
Take a look at the site that houses the video, gapminder. It is great for stats, social studies, health and other subjects!