Coursera 2-3 hours a week , 6 weeks long 2-3 hours a week , 6 weeks long

Coursera 4-6 hours a week , 9 weeks long 4-6 hours a week , 9 weeks long

FutureLearn 3 hours a week , 6 weeks long 3 hours a week , 6 weeks long

edX 14-16 hours a week , 9 weeks long 14-16 hours a week , 9 weeks long

edX 10-15 hours a week , 13 weeks long 10-15 hours a week , 13 weeks long

edX 5-7 hours a week , 14 weeks long 5-7 hours a week , 14 weeks long

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

edX 14-16 hours a week , 9 weeks long 14-16 hours a week , 9 weeks long

Udacity 6 hours a week , 16 weeks long 6 hours a week , 16 weeks long

Udacity 10 weeks long 10 weeks long

Coursera 8-16 hours a week , 5 weeks long 8-16 hours a week , 5 weeks long

Udacity 8 weeks long 8 weeks long

edX 8-9 hours a week , 6 weeks long 8-9 hours a week , 6 weeks long

edX 5-10 hours a week , 4 weeks long 5-10 hours a week , 4 weeks long