Doing one subject to AS level and carrying the other three on to A level is just what DS's school does. There is also an (optional?) EPQ next year. The school has a good insight into how universities operate, so I hope this combination is optimal.
DS really enjoys the AS subject. If he didn't have a SpLD, this may well be the subject for him at university and for the basis of a career. Maybe it still is, despite the SpLD??
I find myself in foreign territory: I trust the school! It's great! I believe that the teachers both know more than me about what DS needs and are actively steering him towards it.
Previously, at primary and secondary school, I've been told that DS is the sort of child who teachers can forget about i.e. the teacher can ignore him and he will still behave and still meet the targets, so the teachers did ignore his needs.
The relief is huge that, finally DS is at a school where he's not an outlier to be ignored and forgotten about! And just in time too as I am out of my depth with all this talk of university visits etc.