Augmented Reality (AR) is a system in which a real-world environment is augmented and enriched by computer-generated input such as 3D video-graphic displays, photographs, written notes and sound effects. AR as a relatively new concept combines computer-generated virtual objects and real objects in a simulated milieu of Virtual Worlds (VWs). Within VWs, data from multiple web services such as Google, YouTube, Del.icio.us, Yahoo, and Flickr are used to form mash-up models. Mash-ups make learning interfaces more engaging for e-learners and become a foremost educational application that facilitates virtual online learning. In this context, the paper provides an overview of mash-up models utilized in VWs within the frame of creative and critical thinking skills  and highlights groundbreaking advances of AR technology. Distance, online and higher education through AR is also discussed by the authors.