A class with tens or even hundreds of thousands of students might sound like a teacher's bad dream. But a big idea in higher education these days is the massive open online course, or MOOC.一个教室坐满几十、几百或数千学生的话，实在是老师的恶梦。但最近有人提出了一种高等教育理念，那就是大规模开放的网络课程，简称MOOC。
