Love the aspect of free education.
It is usually free to take a course through Coursera and other similar groups, including Udacity and edX. However, Coursera charges students $30 to $99 for a completion certificate for a class taken under surveillance monitoring that includes individualistic typing patterns to prove a student's identity. For an additional $60 to $90, a student will be eligible for the ACE credit by taking final exams proctored through webcams. A portion of those fees will go to schools such as UC Irvine that created the classes.