My grandfather, Joseph Justman, was a statistician for the NYC Board of Ed for most of his career. His focus was gifted and talented programs. One of his studies was very interesting, but never fully implemented.
"But what do we do with the gifted kids, they'll just sit in class and twiddle their thumbs?" I don't know, I guess it's impossible for them to help their classmates, or work on a project in class that uses their curiosity and also teaches their classmates something. <shrug> Guess we can't!