I don't really get why this is even a hard thing, surely there is some wordpress/whatever "quiz" plugin that the teachers can use to copy/paste multiple choice question/answers in and the school can pay the minimal fees to host for all their classes.
Textbooks were a scam 25 years ago when I went to school, but many of them were sub $40 or so, and could be picked up for ~$20 used. A few of the science engineering texts were closer to $100 but it was rare to spend more than ~$200 a semester on books.
Frankly, students can organize for all kinds of social issues, I'm shocked they can't organize to force the school to assure that prof's aren't playing into the textbook scams that seem common now. A bit of student fee to host a couple year old quiz server, and download PDF copies of class notes/etc seems like it should be doable. Particularly considering all the schools which have been providing online courseware for 20+ years now, frequently complete with free textbooks/lecture notes/etc.