Coursera, a company founded by two Stanford University professors, offers what are known as massive open online courses (MOOCs). Coursera boasts over 1.3M registered students, with some classes of 50,000 students from all over the world. Students can obtain a certificate from Coursera for passing each course.
Wesleyan is one of 17 new universities to offer courses (New York Times article). There are now 33 different schools, including Stanford, The Hong Kong University of Science and Technology, Brown, and Princeton. Wesleyan is the first predominantly undergraduate institution on the list.