[Avshalom]

https://en.wikipedia.org/wiki/Blackboard

[hartator]

What would be the fancy modern buyable version of this?

[dandrew5]

Keeping it classic, nice. How do you manage the dust?

[snackbroken]

1) Try a few different "dustless" chalk brands. Pick the one that's the least dusty. It probably won't write as nicely. 2) Erase with a damp cloth, not a dry felt eraser. 3) Use a blackboard with relatively low surface roughness. It won't write as nicely.

[farseer]

Perhaps with multiple vacuums attached on the bezels.