Camicaze I agree. So many seem to think IQ is a life sentence and fixed forever determining achievement. Why do we love to label children and unwittingly put a ceiling on their ability.
My son is now a good reader, he has never been seen as able as he really is due to confirmation bias I believe. He can read Charlie & the Chocolate factory and understand it but brings home books with 'the horse neighed' written alone on one page. Meanwhile others, who were further ahead on the reading conveyor belt to begin with, steam on with the meaty chapter books he could cope with, self belief & determination to do even better growing daily.
It's possible to get smarter, a B student could become an A student. Someone who got a 2:1 could get a first and so on.
Edam actually cognitive science is developing all the time, increasingly they believe the mind is more like a muscle and can be expanded.
You mention David Beckham, whatever natural gift he had he practiced unbelievably hard. Matthew Syed has written about the 'myth' of genius in Bounce. Did you know the parents of the Williams sisters decided they would be tennis champions BEFORE they were born?Look at the piano prodigy Emily Bear, she had one of the best teachers in the world right from a very tender age.
Syed found his area was over represented with world class table tennis champions & then saw there were reasons why. He also looked at a group of incredibly gifted violin players and some merely good ones, the difference? Only hours of practice.
The more I study the more I am convinced by his and other arguments. The belief that my intelligence had a limit prevented me from fulfilling my dreams, I don't want the same to happen to my children. The truth is what one person can achieve many can achieve but this doesn't happen for many reasons.
Thruaglassdarkly - I've seen what you describe many times. Teachers subconsciously can begin to see your DC as bright and this has huge advantages. Why don't more believe children can get smarter?
Whatever differences there are in IQ a growth mindset will take you far. What's the point of bothering if you've reached your limit in maths? Mindset by Carol Dweck makes some good points.
Can't sleep :)