[bpt3]

Until most kids are about 12 - 14 years old, they're learning much more basic concepts than you're describing. I don't think anyone is trying to take intro to computer science out of high schools or preventing an advanced student younger than that from the same.

I would rather a teacher have to draw a concept on a board than have each student watch an animation on their computer. Obviously, the teacher projecting the animation should be fine, but it seems like some educators and parents can't handle that and it turns into a slippery slope back to kids using devices.

So for most classrooms full of students in grades prior to high school, the answer to your list of (presumably rhetorical) questions is "Yes."

[Izkata]

There's an in-between point my math teacher loved using: an overhead projector. Hand-drawn transparencies that could be made beforehand or on the fly, protected large so everyone could see, without hiding the teacher behind a computer - they'd still stand at the front of the class facing the students.

[bpt3]

Sure, that would work too. I wouldn't say that's in-between but a technique that can be used without incorporating any modern technology at all.

[mike50]

This has been replaced by a webcam on a stick and a computer monitor.