Writing to PC/overhead device: What is it called?

Factual Questions
1

What is this device called that this instructor 9. [Arclength] | College Calculus: Level II | Educator.com is writing on, which makes his writing appear on camera/PC?

Thanks,
hh

2

It’s looks like your basic digitizer tablet to me.

3

Probably the Wacom Cintiq Tablet.

4

Thanks, **beowulff **and GuanoLad.

Sorry for the late response. I’ve been incommunicado for the last 24 hours.

5

In an educational setting my first guess would be a Mobi.