Selection bias is the most powerful force in education
Parents, teachers, and students are so focused on &quot;education&quot; as a pedigree and job pipeline that if they don&#x27;t see an immediate connection between a topic and a paycheck they&#x27;re like &quot;Who cares?!  Why are you wasting my kid&#x27;s time on that?&quot;<p>When the whole thing is an exercise in competitive pedigreeing, of course it&#x27;s going to be gamed.  If it were more about human development, we&#x27;d be focusing on the deltas instead, and they&#x27;d be harder to fudge.