This article is hugely popular – and why not?
A common “rebuttal” says, schools divide children by ability, and children can skip grades. No, it does not work that way. Bright students can and do learn all the arithmetic taught in K-12, in just months rather than years. Bright children are often years ahead, when it comes to reading skills. Their teachers, by contrast, are often well behind. The article above is wildly popular among the top fifth of the class, because they lived through it.
Some kids are born sprinters. Schools – even “gifted” classes – force them to plod.