O the GCSE to A-level thing:
DC's (otherwise excellent) school only does double science for GCSE.
I compared it to another school not too far away, of a similar type and in a similar area, which does do triple.
Both have pretty much identical A-level science results.
In wider discussions, including with university, it seems to be equally successful to:
- Do double in a school that only does double, then A-level sciences in the same school
- Do triple in a school that does triple, then on to A-level science in the same school
because the A-level teaching will start in the appropraite place for the background their students have.
Less successful is double, then A-levels in a school where most or all have done triple, simply because of the likelihood of leaving gaps.
Conversation with a (top) university revealed that they were absolutely happy with both double and triple as backgrounds for their science students, and that even at a very top institution they had a mix of both on their science courses.
As it happens, DS is no scientist (though DD may go down that route), but my initial horror at the lack of triple was much allayed. DD has started doing coursework for double science in Y9, though, so the demands even of that course have clearly ramped up in the new spec.