Chalkboard
Chalkboard? Hmmm....
Are those even used anymore? ;)
Remember, there was a thingy that was used to draw a bunch of lines parallel to each other? Like a holder that held maybe six pieces of chalk? I think it was used for drawing music staffs on the board. Maybe also for grids and graphs.
I tried using one a few times. The chalk always broke or fell off, and the lines I made were all jagged with gaps...
It took real talent to use such a highly complicated device.
I guess I wasn't meant to be a music or math teacher (yeah that's why... the chalk...)