My son’s Calculus 3 course went from “live” to online. The videos he has to watch are not from his professor. There is no opportunity to ask questions. There are no study groups because the university is closed. Everyone’s grades have dropped significantly since the course shifted to online. A number of students have since dropped the course. Final exam is next week.
Math is nearly impossible to learn by just reading a book. It requires rote style learning and constant repetition and correction, which can only be done in class.
The prof and/or the prof’s TAs can’t be bother to tutor over the phone or on Skype?!
My Calculus III course did the same, and I agree with every one of your statements. The only thing that saved my butt was that I found a really good on-line professor.