SKIES App for iOS
A collaborative learning universe accessible via the Caltech website and iPhone/iPad app. In a classroom setting, it functions as a bulletin board. Teachers and students post class materials in the form of “cards”, which may contain text, pictures, drawings, audio clips, web links, or videos; as well as quiz questions in many different formats. The cards are linked together into an easy-to-browse “class tree”. Students and teachers both create content. Learning made simple by one "card" at a time.
This is a free app.