This isn't the first time such changes have happened. https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/New_Math, target of the famous Tom Le

This isn't the first time such changes have happened. https://en.wikipedia.org/wiki/New_Math https://en.wikipedia.org/wiki/New_Math, target of the famous Tom Lehrer song by the same name. The idea even seems exactly the same as common core: >In that unfamiliar context, students couldn't just mindlessly follow an algorithm, but had to think why the place value of the "hundreds" digit in base seven is 49. Keeping track of non-decimal notation also explains the need to distinguish numbers (values) from the numerals that represent them