There are two interesting videos on YouTube that trace the history of teachers over the past four hundred years:

The Evolution of Educators – Part 1 (1600-1900)

The Evolution of Educators – Part 2 (1900-Present)

I’m not embedding them here because I think it’s worth watching them at the YouTube site and seeing the surprising number of other videos related to the history of schools you’ll see on the side of the page.

Thanks to Big Education Ape for the tip.