At the end of the day a school is only as " good" as the DC who are on roll there. This has always been the case. There were always failing schools and the old grammar school system only served to hide what was really happening.
The real problem has always been ( and remains) attitudes. This largely comes from culture and socio economic backgrounds. In the past there was a place in work for those who had the " lark about" attitude for school ( it was called a factory floor) . Now the place is the dole queue. Previously aspiration would have been to have a job and earn money ( and there was some work ethic for that). Now they just stand on street corrners and wait to be
"discovered" and become " famous" ( "Cos I gotso much talent its obvious innit?"
The big difference is that previously ( forty years ago) most DC were compliant and well behaved in school ( even those from poor homes) and so it was possible to get an education if you wanted. Now, it isnt possible because DC are noisey and arrogant and disdainful and rude to the point of obscene and ill mannered and plain ignorant - and they want to make sure everyone else joins them but ensuring that it is not possible for anyone else to learn either ( "well , if I aint gettin' an education and goin' nowhere, why should you?")
I could lay the blame for all of this ( or at least identify the changes that seem to have led to the dead end attitude and disruption) but to do so would be MN suicide as it would open a can of worms no one wants to see is there.
Unless you address the cultural and socio economic issues first, education will continue to " fail" for most in state schools - although to be truthful I suspect it is " fit for purpose" for the majority who will end up on the dole in these times.
Meanwhile if you value education it has to be a private education because the reality is that for the majority the choice is simple - private education or no education. Mr Clegg knows this.