Average hours per week put in--Harvard Extension School Courses

Hello all, I am arranging my schedule and curious. Those who have taken Harvard Extension courses, on average how many hours per week were put in per course?
I really do understand that everyone varies, but looking for an average so I don’t over extend myself with family obligations.

Thank you for any advice, tips or experiences.

http://www.extension.harvard.edu/about-us

As the average age of an extension student is 33, I imagine many students have full-time jobs and families to support, so my guess would be that most students take 1-2 courses and manage to do the work in however many hours it takes.

FWIW: In the five years that I’ve been on College Confidential, I haven’t encountered one poster from HES, so I’m not sure you’re going to get an answer on this forum. I would suggest calling an HES advisor and asking them the question.