Wikipedia turned ten years old this month. Like anything that lives for ten years, Wikipedia has changed over those years. The State of Wikipedia, an animated video narrated by Jimmy Wales, chronicles the development of Wikipedia over the last ten years.
Even though Wikipedia has been around for ten years and many teachers have come to the place where they allow students to use it as a starting point in research, there are still many who do not understand Wikipedia. For those people, Common Craft has a clear explanation of how Wikipedia operates.