Mass online courses provide a learning format in the basis of which there are short webinars, automatically checked tasks and simulators, and educational community. Students learn at their own pace, paying not only for content, but also an educational service. The content volume for one course is 6 hours of video + 30 hours of homework. All courses are available on open educational online platforms with a multimillion audience - Coursera, edX, Udacity, Stepik, Open Education, where within one educational program from 10 to 100 000 people learn simultaneously.