So now it’s formal learning, not education. OK.
As far as keeping up with natural growth and development, language acquisition is before age 8 and 10. It’s very powerful at age 3 and 4, when they sit on their parent’s lap.
Psychomotor development is later, to be sure, but not for all. Gifted students need challenges sooner than the norm.
And for those who like a competetive edge, time is sparse. The advantage is to those who get there sooner.
No, not *now it’s formal learning/education*. It’s always been their contention that it’s formal book learning/education.
Reread post 37 amd most of your questions will be answered.
I don’t know what the bee in your bonnet is about, but read the book and you will learn.