This fall I am teaching a class in enhancing the social studies classroom (if you are a Fairfax County, VA teacher there is still room if you want to sign up).  One of the things I am going to try to do is model good teaching in that I will have different people going at different speeds.  To do that I am finding all kinds of how to videos for those (like myself) who are visual learners) so you will see me adding those like the one posted below and the above 1:39 video which very quickly and nicely covers how to make a Prezi presentation.  If you have never heard of Prezi, it is a very different way to make a PowerPoint.  Here is an example.