21st Century Learning for 21st Century Skills 7th European Conference of Technology Enhanced Learning, EC-TEL 2012, Saarbrücken, Germany, September 18-21, 2012. Proceedings - Ravenscroft, Andrew; Lindstaedt, Stefanie; Kloos, Carlos Delgado; Hernández-Leo, Davinia (Springer Berlin Heidelberg : Imprint: Springer, 2012)