I'm taking classes for an online program right now where the courses allow online-only part time, in-person part time, and in-person full-time students (a few i

I'm taking classes for an online program right now where the courses allow online-only part time, in-person part time, and in-person full-time students (a few in both undergraduate and graduate tracks). The last two had many hundreds of enrolled students. Especially at larger universities, the question is the availability of TAs -- every assignment in all three classes so far has had writing components that require human grading. Online students require a significantly lower load of in-person support (office hours, multiple lab sections, etc) because they're expected to do more self-teaching. Stanford's public machine learning and other CS courses with their 10's of thousands of completing students, or EdX's Harvard CS50 class with its 1000's of students are good examples where grading against a rubric seems to scale.