Isto é interessante. Clique no link para ler o texto completo. Aqui vai a citação:
Lower the cost of not attending class and expect fewer students to attend.
By visiting the course’s websites, the 200 enrolled students could download audio recordings or watch digital videos of the lectures, as well as read the instructor’s detailed lecture notes and participate in online discussions.
But there was one big problem: So many of the undergraduates relied on the technology that, at times, only 20 or so actually showed up for class.