How to improve Public Education?

"Make private schools illegal," he said, "and assign every child to a public school by random lottery." Think about this. If suddenly CEOs' children, diplomats' children, and the children of our nation's leaders were attending schools across DC, I guarantee we would never see a faster moving of resources from one end of the city to the other. I also guarantee we would soon have a system of high quality schools in which every child would get an excellent education. 

Warren Buffett

 Source: What are some of the biggest problems with public education in America? - Quora