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 Le

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 https://www.youtube.com/watch?v=UIKGV2cTgqA