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Online instructors should be cognizant of where participants are physically located; when members of the course span two or more time zones, the timing of the course can become problematic. Initial preparation of an online course is often more time-consuming than preparation for the classroom.

Course Hero was founded by Andrew Grauer at Cornell University in 2006 for college students to share lectures, class notes, exams and assignments. [4] In November 2014, the company raised $15 million in Series A Funding, with investors that included GSV Capital and IDG Capital. Seed investors SV Angel and Maveron also participated. [5]

SlideShare is an American hosting service, now owned by Scribd, for professional content including presentations, infographics, documents, and videos. Users can upload files privately or publicly in PowerPoint, Word, PDF, or OpenDocument format. Content can then be viewed on the site itself, on mobile devices or embedded on other sites.

Clips4Sale (C4S) is an American adult video content selling website and is known for fetish content. It launched in 2003. Clips4Sale is the largest clip site on the internet with over 7 million clips and 105,000 independent content producers on its platform. [citation needed] It is based in Florida, United States.