Among respondents to the Babson survey, YouTube was the preferred tool for teaching, with more than a fifth of professors using material from the video-sharing community in class. (Less than five percent said they use Twitter to transmit information to students.) Facebook and LinkedIn, meanwhile, were the most popular tools for communicating with colleagues. About ten percent of all respondents instructed students to create content within a social media community — such as contributing to a blog or posting a video — as part of an assignment.