Nope it is not that - it is about level of teaching in my view, and you need to look at acceptance levels in sciences particularly - I have a DS who like many boys is science /maths orientated and we are deciding between selective Indy and superselective grammar so pertinent question, Dismissing it as Oxbridge is not be all and end all is a bit facile, isn't it?.
See here from the Sunday Times - Dec 2012
"AN ALARMING gap between the success of state and independent-school applicants for maths at Cambridge is revealed by internal figures that have fuelled the row over A-levels.
Maths is the subject with the third-highest number of state-school applicants to Cambridge but it has the lowest acceptance rate — just 18% were successful last year compared with 40% of those from independent schools. The gap is reflected at Oxford where 14.5% of state-school applicants were accepted for maths compared with 22.8% from independents.
State-school applicants are also far less successful in subjects that rely on maths, such as science, engineering and medicine. In computer science, only 24% are accepted, compared with half of those from private schools.
In humanities subjects, the difference is much smaller and in economics, history and modern and medieval languages, the acceptance rate is the same in both sectors.
The maths figures have prompted dons and academics at some other Russell Group universities to make private representations to the government for an overhaul of the A-level.
Academics at Cambridge and King’s College London are being funded by the Department for Education to develop more challenging materials for use in school sixth forms. Michael Gove, the education secretary, plans to use the results to strengthen the A-level and inform a new qualification to be devised in consultation with universities.
“Mathematics teaching at A-level tends to be very narrow and procedural and this is the case across the state and independent sectors. A handful of schools go well beyond the syllabus and they are the ones dominating the Oxbridge entries,” said Jeremy Hodgen, professor of mathematics education at King’s College London.
The reform is being opposed by teachers’ unions, which say gearing the A-level to high-flyers would deter other students.
Cambridge and Warwick require maths applicants to sit “sixth term examination papers” (Step). Bristol, Oxford, Bath and Imperial College London encourage students to take the papers.
Nick Edwards, who is studying economics at Cambridge, received extra maths classes at Tiffin school in Kingston, southwest London. “In A-level maths and further maths, the methods to solve each question are given to you on a plate. You go through the motions that your teacher will have drilled into you. In Step, you have to work out which methodology to use to solve the problem, then solve the problem itself. It’s a better test of pure logic, and there’s a creative element to it as well,” he said."