The largest-ever survey of professors who have taught MOOCs, or massive open online courses, shows that the process is time-consuming, but, according to the instructors, often successful. Nearly half of the professors felt their online courses were as rigorous academically as the versions they taught in the classroom. The survey, conducted by "The Chronicle," attempted to reach every professor who has taught a MOOC. The online questionnaire was sent to 184 professors in late February, and 103 of them responded. Hype around these new free online courses has grown louder and louder since a few professors at Stanford University drew hundreds of thousands of students to online computer-science courses in 2011. Since then MOOCs, which charge no tuition and are open to anybody with Internet access, have been touted by reformers as a way to transform higher education and expand college access. In the largest survey of instructors who have taught massive open online courses, "The Chronicle" heard from critics, converts, and the cautious.