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This has been replaced by a webcam on a stick and a computer monitor.