Many elementary teachers don’t understand math, and it makes them anxious

Re:Many elementary teachers don’t understand math, and it ma... by _bxg1 on Saturday November 30, 2019 @12:21AM (#21668694)

Yep. I remember in college when I made that connection and realized you could create infinite "levels" of operation, with each repeating the previous one N times.

[ Parent | on HN ]

Re:Many elementary teachers don’t understand math, and it ma... by pas on Saturday November 30, 2019 @06:14AM (#21669488)

https://www.youtube.com/playlist?list=PL3A50BB9C34AB36B3

For anyone interested in going down the rabbit hole of those infinite levels.

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Re:Many elementary teachers don’t understand math, and it ma... by pbhjpbhj on Saturday November 30, 2019 @09:17AM (#21670039)

Up-arrow notation ftw.

[ Parent | on HN ]

Re:Many elementary teachers don’t understand math, and it ma... by all2 on Saturday November 30, 2019 @10:11AM (#21670269)

I'm missing the context here. The only arrows I'm familiar with are vector notation and ion spin notation.

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Re:Many elementary teachers don’t understand math, and it ma... by applecrazy on Saturday November 30, 2019 @10:22AM (#21670322)

I think they're talking about this, which appeared in a front-page HN post from yesterday: https://en.wikipedia.org/wiki/Knuth%27s_up-arrow_notation

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Re:Many elementary teachers don’t understand math, and it ma... by pbhjpbhj on Sunday December 01, 2019 @02:47PM (#21677416)

Not that story in particular, it's a perennial story on HN - I first learnt about that notation through the "largest number you can write on a postit note" challenge.

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Re:Many elementary teachers don’t understand math, and it ma... by rocqua on Saturday November 30, 2019 @08:12AM (#21669812)

If you do this, 2 and 2 will always make 4, no matter what level you go to.

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