A NOVEL TUTOR-GUIDED PLATFORM FOR INTERACTIVE AUGMENTED REALITY LEARNING Topics: Authoring Tools and Content Development; Av-Communication and Multimedia; e-Learning Platforms, Portals; Intelligent Tutoring Systems; Virtual Learning Environments In Proceedings of the 3rd International Conference on Computer Supported Education - Volume 1: CSEDU, 88-93, 2011 , Noordwijkerhout, Netherlands