Pounding the dust out of the erasers was something American students often found...

		bitwize 28 days ago \| parent \| context \| favorite \| on: Why do Stanford math professors still use chalk? (... Pounding the dust out of the erasers was something American students often found fun, especially as elementary school students; this is referenced in the Tom Lehrer song "New Math": https://www.youtube.com/watch?v=UIKGV2cTgqA