<p>I actually think the biggest advantage of the US public school system is that it doesn’t formally segregate students into different levels or streams based on marks. The social conventions do it anyway; there is really no need to reinforce an assumption in a kid’s mind that he/she is mediocre in, for example, physics and math. To answer the question, I think schools must provide resources to help the “talented”, but also realize that big moves to separate any group of students from the rest lead to a less “mobile” community where enought students will have given up on striving for excellence.</p>