We use Prezi all the time to teach new content. The kids enjoy the different format, and the optical tricks keep them interested. My teaching partner actually likes it better than I do, but I am trying to become more adept in it. I LOVE Stupeflix! It is easy and fun, and I use it all the time for content intros. We have taught and encouraged our kids to use both of these programs when doing different presentations. They will have the option again when they teach their classmates government.