alt Hacker NewsThe number 1 predictor of educational outcome is IQ by a long shot, which is hardly affected by any of the factors you listed. Yes, high IQ kids usually have high IQ parents who are likely to prevent those things, partly because they are likely high income, but none of those are as important as how smart the child is.
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Most people are pretty average and plenty of average people make it through a typical Bachelors program just fine.
While there may be some concepts that some will struggle with or unable to handle, the VAST majority of school comes down to the effort an individual puts in. You won't pass with zero effort. Some may be able to skate by with less effort because they can reason better, but in the end it will always come down to effort put in.
If you are not high IQ, that means you need to put more effort if you want to get "straight A's"... it is emphatically not an excuse to give up, not try or lower standards. I say this as someone somewhat high IQ who was a bit lazy and easily distracted in school. There were lots of kids that weren't as smart that got high grades and did well.. because they put in the work. I'm also a bit older than a lot of people here (early 50's).
I scored ~145 on a recent WAIS assessment (with low to average processing scores) and I could train most children to do the same if they started early enough.
That's basically what my upper middle class parents did for me, as the tests were very similar to games I was given since a young age. Of course there are other more important developmental factors like health, stability, and nutrition but those are easier with money too.
Most of HN seem to support a form of modern eugenics.
It's actually zip code.
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The heritability of IQ actually changes based on wealth, so its the other way around. A child from a wealthy family will reach their potential, where one from a poorer family will not. (https://pubmed.ncbi.nlm.nih.gov/14629696/)
A child may have the genetic potential but never reach their potential because of outside factors. One's environment shapes one's brain development.
That's why equity is just as important as equality in education. Equity is understanding that children start from different circumstances and may need specific support to actually reach their potential.
Although the biggest factor here would just be for society to make sure no child has an upbringing where food, shelter, other lack of resources are a problem.