As for blackboard, I remember the "treat" in elementary school was getting to clap the chalk out of the erasers outside to help the teacher.. Now you would have to wear a hazmat suit.
Supposed to snow overnight tonight. We are getting spared on this one with maybe an inch or two. Looks like the DC area is going to get pounded.
I remember clapping the erasers as well. We would smack them on the side of the brick wall to make "graffiti".