The latest report from The Sutton Trust (pdf) looks at a topic it last visited in 2003: how the backgrounds of state school teachers compare to those of independent school teachers. Its finding is that there is still a significant difference between the proportion of teachers at state and independent schools that have studied at the UK's best universities. Independent school teachers were also found to be the most likely to have a degree in the main subject that they teach. Here is the percentage of all teachers who attended a Russel Group University, by post-A level qualification:
Most people would expect this result. But what is more surprising, yet garners less attention, is that the heavily-regulated environment of state education hinders its flexibility to hire the same, or better, quality of teachers as independent schools.
There is some anecdotal evidence to suggest that the lack of formal requirements for teachers entering the independent sector actually encourages, rather than discourages, applications from graduates of some of the UK's leading universities, because top applicants wish to enter the teaching sector immediately, rather than pursuing further qualifications.
State schools in England, Wales and Scotland are required to be registered with the NCTL and their General Teaching Councils, respectively. Private schools are free of this requirement and can hire applicants with specialist subject knowledge that want to teach soon after they leave their field of expertise.
In independent schools, teachers are not required to have Qualified Teacher Status, which, according to Elliott Lockhart's 2010 survey "has led some to portray teachers in the independent sector as unregulated, unaccountable and lacking the necessary professional preparation that would make them fit to teach."
As we know from the report and our general experience of the private education market, this is far from the case and actually strengthens the choice of employees that independent schools benefit from. For Scotland, this is particularly concerning as we are about to enact a law (see a recent Telegraph article about it here) making independent schools subject to the same requirements as state schools. So we would practically have no schools not subject to these restrictions.
Right now Scottish independent schools, like is the case in all of the UK's constituent parts, take advantage of teachers registered outside of Scotland and this legislation would prevent that. On top of this, the Scottish government also doesn't engage with Teach First; a programme that is injecting fresh talent into schools in England and Wales and is one of the reasons, judging by the teacher background metric, that state schools have been catching up with independent schools in the last 12 years.
Scottish politicians should reject the Education (Scotland) Bill as private schools are the perfect testing ground for trying out what works and doesn't work. Subjecting them to the same rules as state schools will impede progress and diminish their autonomy - they're independent for a reason.