Video 7 PL round elbow

[@terrencerucker7291]

Thank you very much for your easy to understand instructions. I'm a 1994 grad that needed a refresher course

[@emmamoores503]

Immensely helpful, thank you sir!!

[@MarkStMartin-p8c]

Any ideas what the name of the mechanical sliding arm that you use to draw on the board is called? I'm not sure if this channel is still active, but I would love to add this to our classroom