Per Math Forum and other venues, I've been pioneering some Pythonic Math in the context of a free web delivery framework.
Some assume use of "distance education" tools means the teacher isn't on site, or that the students are remote from one another.
This may well be the case.
On the other hand, there's no reason a teacher can't have small, intimate classes, and yet still make use of the very same web frameworks, for in-class use (as when projecting).
If each student has a personal screen, then using a web framework to deliver content, even with students in the same room, may be the teacher-preferred modus operandi (M.O.), i.e. it beats making 'em squint at a chalk board, listen to squeaking.