Cortina - That boy's story was one of my teary moments. Five years in a distruptive environment stunted his ambition to learn and made him lazy. When he makes it to year 12 and A-levels he's too far behind to really catch up. Yes, he'll do ok and get into a 'lower' university and get an ok job - but he could have been so much more. Imo that is one of the 'hidden costs' of our education system.
I think you can "learn to be less intelligent" but whether you can ever fully recover I don't know. As Birbalsingh says those teenage years are vital for brain development. Plus there's the matter of 'work ethic' which was discussed on your thread a few days ago (I lurked
).
The 'Oxbridge near miss boy' a black boy who believes he has to make the choice between doing well academically or having friends. He chooses the former
.