Coursera 4 hours a week , 4 weeks long 4 hours a week , 4 weeks long

edX 4-6 hours a week , 6 weeks long 4-6 hours a week , 6 weeks long

Coursera 5-10 hours a week , 6 weeks long 5-10 hours a week , 6 weeks long

edX 5-8 hours a week , 12 weeks long 5-8 hours a week , 12 weeks long

Coursera 10 hours a week , 4 weeks long 10 hours a week , 4 weeks long

edX 2-4 hours a week , 9 weeks long 2-4 hours a week , 9 weeks long