Flickr is a photo aggregating and organizing service. Flickr also has the capability to support discussion groups. William Allen’s article, Using Flickr for Media Rich Classes, discusses how he leverages discussion groups around Art History content to encourage conversations about the works they study. He also discusses the various privacy options available and how Flickr is superior in this regard to learning management systems. Allen notes, “When teaching and learning revolve around images, the way that a learning management system buries images as a discussion develops hinders the image flow so crucial to image-based teaching.”
Read more at: http://www.educause.edu/ero/article/using-flickr-media-rich-classes