Of course, I am familiar with Youtube. I think this is every teens favorite site! I know at the elementary level we are not able to access Youtbube. I heard of Teachertube this springs but hadn't looked until today. Constitution Day is a subject that is wanted one day a year. I have a few books that of course teachers have to share. I have used United Streaming in the past but Teachertube will be a great resource to use.