Thanks for the responses re: planning. I am supposing that at Indies there is more flexibility, less change, year on year, as they don't have to follow DofE so closely?
As an aside, and looking at the teachers of the future. A few of older DD's cohort went into teaching. All from top indy schools, and top unis. Many have gone into indy or grammar schools, but quite a few went in via Teach First, and have survived the journey despite being in some very challenging schools. The overriding feedback is that there are some really badly managed schools, and some excellent ones, regardless of area or deprivation. They have been in some terrible schools, left and then found much, much, better ones. Management matters hugely.
My DD is thinking about teaching as are some of her cohort too. There is always a narrative of "young people don't want to do this or that" particularly teaching, nursing etc. But my instinct is that they do, evidenced by the huge numbers of youngsters applying, but that retention is difficult. The culture definitely needs to change, in both education and health, from the public, and from the organisations.