On: Increasing Retention Without Increasing Study Time...

[shortrounddev2]

They don't teach multiplication tables anymore as far as I know. I didn't learn them and I was born in 1995

[Brybry → shortrounddev2]

Wouldn't that be weird given that it's part of common core?

> By the end of Grade 3, know from memory all products of two one-digit numbers.

[1] https://www.thecorestandards.org/Math/Content/3/OA/#CCSS.Mat...

[lupire → Brybry]

Knowing the products is not the same as using or cramming the tables.

It is quite sufficient (and probably superior) to learn the facts through use, for that makes them robust.

[shortrounddev2 → Brybry]

I learned that through brute force. They just had us multiply numbers over and over again rather than memorizing the table

[gumby → shortrounddev2]

They still teach them in Germany, though I think maybe only up to 10x10 these days.

In the US AFAIK they are called "times tables"; in Germany "one times one" („Einmaleins‟). It's funny what people emphasize for the same thing.

[HappMacDonald → gumby]

"these days"? The goal is to memorize single digit products and use the multi-column algorithms when you need to do more digits. To which days are you referring where kids would be called upon to memorize multidigit multiplications? In the 1980s I had a trapper keeper with a 12x12 table printed on it but even my seven year old ass knew back then that everything >10 was wasteful to memorize. :P

[gumby → HappMacDonald]

20 years ago my kid still had to learn up to 12x20. The 12s are pretty handy for a bunch of reasons, and especially if you live in the USA. Using base 10 for the metric system was a mistake.

[Tempest1981 → shortrounddev2]

Interesting, in the US? What state?

[shortrounddev2 → Tempest1981]

Virginia