As the article notes:
"Above all, though, there has been a change in the quality of the debate. In particular, what might be called “the three great excuses” for bad schools have receded in importance. Teachers’ unions have long maintained that failures in Western education could be blamed on skimpy government spending, social class and cultures that did not value education. All these make a difference, but they do not determine outcomes by themselves."and:
"So what are the secrets of success? Though there is no one template, four important themes emerge: decentralisation (handing power back to schools); a focus on underachieving pupils; a choice of different sorts of schools; and high standards for teachers."