focus your time and energy on what you want to see more of

Yeah?

Or less insane 'word problems' and just LOTS and LOTS of simple, clear problems pertaining to whatever they're learning at the time. The excessive terminology, and the need to memorize that on top of the mathematics, is not helping either.

I hate it.

That's irrelevant – those are both sponsored listings and therefore are to be ignored. Also, reviews can be VERY weak evidence of quality. I suspect many are fake. Amazon DOES sell LOTS of great products. No one can reliably FIND great products using Amazon itself.

There are no fixed meanings ...

This was pretty funny when it happened to me too! A cost (and benefit!) of instructing one's child to 'just make something up' for dumb projects or assignments

Danegeld

This was one of my favorite books as a kid, but I have no idea what being “oneshotted” by it might mean.

There's a curious thing happening in weather twitter where, for every actual storm, you get two weeks of buildup and model run drama, so that in the end you end up posting about 30-50 imaginary storms. I imagine this has analogues in other fields. Modeling + social media = drama