And CS109 which I used to TF: https://www.extension.harvard.edu/course-catalog/courses/crn/15178 https://www.extension.harvard.edu/course-catalog/courses/crn...

And CS109 which I used to TF: https://www.extension.harvard.edu/course-catalog/courses/crn/15178 https://www.extension.harvard.edu/course-catalog/courses/crn... Not sure where you got the $50k? Mine was significantly less like $25k, which is a great value for many of same classes as the College.