PROS
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CONS
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EdX
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Quality content
Choose subject per university
Preview of the course available
Verified certificates
Diversified subjects
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Lecturers with an accent can be hard to follow specially for non-native
English speakers
Courses offering is still limited
Technical glitches affecting learning experience
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Coursera
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High number of courses
Courses available in foreign languages
Selection of courses with multiple criteria
Mentoring, employment support
Proctored exams
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Courses sometimes are rescheduled in the last moment
Additional fees
Peer grading is difficult sometimes
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Udacity
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Courses difficulty per level
Able to sign with Twitter and Facebook
Interactive tutorials
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Not much information regarding the course itself
Limited content
Computer science dominated courses
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Khan
Academy
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Broader content
Knowledge map feature
Sign with Facebook and Google
Big video library
Coaching
Interactive lectures with comments from students
Tutorial on how to use the site
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Not all courses have descriptions
Video lecture are hosted on Youtube
Some lectures lack quality
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Guide for open, online and free education, featuring online degrees and online colleges
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