The World Of Massive Open Online Courses
 Presented By: Online Colleges     The  Johns Hopkins University  is joining a group of elite universities that will offer free online courses  through a company called Coursera, a collective leap that could open higher education  to a broader audience.   Though Johns Hopkins already offers courses online, Coursera is considered a potential game changer, because its classes will be available to unlimited numbers of students around the world. Some experts believe so-called "massive open online courses" could de-centralize higher education.   Hopkins officials say the courses will offer a mere taste of the education offered to full-time students. "It isn't really comparable to coming and taking a full degree program," said James Yager, associate dean for academic affairs at the university's Bloomberg School of Public Health .     But Yager said that the effort could be "transformative" in distributing public health information from Bloomberg to peopl...