Well, that didn't work.
My belief is that there is much you cannot change. The things you can change aren't as much fun for the chattering classes.
Intelligence does not change. It mostly occurred when the sperm fertilised the egg. After that you can damage intelligence but cannot raise it.
However, 1) Knowledge can change; 2) skills can change; 3) content matters (computation, reading, accurate history and science, excellence vs pandering in the arts); 4) IQ is a real thing, but it isn't everything, and 4A) IQ isn't much of anything in many fields, beyond a threshold minimum;* 5) Educators have damaging assumptions based on how they got their own educations and jobs, which are not representative of the population as a whole, and 5A) they mostly aren't smart enough to see that; 6) we should keep trying new ideas, because eventually we will hit upon good things by accident; 7) our current education system, preschool through PhD does work for a small but constant percentage of students, and that is fine, especially in STEM and other highly-measurable disciplines, even though 7A) those students mostly succeed by self-teaching - thank God we let them; 8) Pournelle's Iron Law of Bureaucracy may apply to education more than any other field.
*For example, the selling of shoes, software, stained glass, steaks, saxophones, and sex all have different minimums, but once that minimum is reached, other knowledge and skills become much more important to career success.
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