Virtual Classroom
** ADVANCE FOR WEEKEND MARCH 17-18 ** Ball State University instructor Sarah Robbins works on a computer at the front of the class March 6, 2007, in the Robert Bell building in Muncie, Ind. Over the past eight months, Robbins has been teaching her freshman composition course in Second Life, a virtual-reality world that technology enthusiasts are heralding as the future of Internet communication. (AP Photo//The Star Press, Melanie Maxwell)