http://chronicle.com/img/photos/biz/icons/wired-campus-nameplate.gifBy Steve Kolowich. As online courses multiply outside the formal structures of academe, professors increasingly have opportunities to earn cash on the side by freelancing. Udemy, an online-education company, offers anyone, including professors, the chance to design and teach an online course. Instructors set the prices for their courses, which tend to run from about $30 to $100 per student, and take home 70 percent of the revenue. Read more...