The Government says , with respect to its recent Green Paper, ‘ Within our new proposals, we have been clear that we expect selective schools to support non-selective schools, looking to them to be engines of academic and social achievement for all pupils, whatever their background, wherever they are from and whatever their ability’ So the clear presumption is that selective Schools have better teachers and teaching than non-selective schools.. but where is the evidence? The fact that selective schools perform better could be entirely due , or due at least in significant part, to the quality of their intakes, surely?  You would have to demonstrate that selective schools add more value to their pupils than non-selective schools across the board to justify such a claim.  In which case, where is the data that shows us  that this is the case?