> I'd ban all technology in the classroom. What works is chalkboard and chalk, pencil and paper.

You've prohibited technology and then listed four technologies. "Technology" needs a more concrete definition. Calculators? Computers? TVs? Overhead projectors? Musical instruments?

They appear to be equating technology with products that did not exist when they were in elementary school.

That would be correct! And all the technology added since has resulted in no discernible improvement in educational results.

In college, the classes were a lecture with a professor, 9 blackboards and colored chalk. Not even handouts (well, there was one on time dilation).

Calculators utterly wiped out slide rules when I was in college, though nobody learned any math from a calculator. Calculators just made for quicker work to more significant figures.

This is nitpicking

And sure, kids 6-13 don't need calculators, basic stuff, like multiplication tables is memorized.

I attempted to memorize the times tables. Eventually, I noticed the pattern. From then on, I used the pattern rather than memorization. For example, I compute 9*12 as 90+18.

I assume you're hinting at this, but yeah, that's the idea behind getting children to memorize and do rote math early on. There's really no better way to get people to really deep down learn strategies for dealing with numbers than repeatedly practicing and memorising stuff until they accumulate a huge bag of mental "shortcuts" and patterns and strategies they use