Jeee I live in Kent and the school my children go to is in no way a "secondary modern". It is a true comprehensive, with children who have gone to Oxbridge and others who take vocational exams.
Many of the subjects are "setted" - definitely English and Maths and, as you go higher up the school, science and other subjects.
My children's school does offer 3 separate sciences, it offers two MFLs, but does not offer a classical language, but neither do all the grammar schools around here.
I firmly believe the results and reputation of a school depend on the commitment of all who go there. We, the parents, have to sign a contract with the school, the school signs a contract with us and our children and the children also sign a contract with the school, setting out the standards of behaviour that are expected of all parties.
I have three children at this school and have been very happy with the education they have received. One of my children is in top sets for all subjects (could have taken 11+, but did not want to go to a single sex school), one has worked their way up through the sets and is in top set for some subjects and not for others and the other has only just started, but I have no doubt that they also will reach their full potential.
I believe that it is not just exam results that count. I believe that the children need to learn how to interact with all sorts of different people, not just hothoused academic children.
It is a shame that not all children are as lucky as mine and are able to go to a true comprehensive.