Thanks for your really thorough reply Toomanyminifigs. You've given me loads to think about.
I think my DS is a lot like yours. He studies history at a level of detail which wouldn't be out of place on a first year undergraduate course. And reads adult non fiction books for fun. But his spelling and grammar is early to mid primary school at best. And his handwriting isn't legible.
I don't know the answer to a lot of your questions- but I will definitely ask, as they are all very sensible.
In terms of peer group, I get the impression that the general academic level is very low (understandably). It's a mix of mild learning disabilities, autism and social/emotional problems.
He'll be in a class of 6 to 10, organised by social/emotional level rather than academic ability.
I don't necessarily mind the mix of kids since DS is quite low ability himself in some areas and because the classes are small enough to allow for individual differentiation.
No idea of destinations other than "back into mainstream" or "college". The school as a whole doesn't send a lot of DC to uni (deprived intake) so I doubt the ALN unit will be the exception.
I don't know how DC are supported in mainstream lessons. I would hope a 1to1! I don't know about homework. DS couldn't do homework after a day at school (too overwhelming). But he could do some during time in the unit or (if on a part time schedule) during a day off.
We'd obviously have to keep it to a minimum though, particularly if he was doing a few different subjects.
I also need to ask what happens when the kids start studying for NAT5s (Scottish equivalent to GCSEs). Would he have to commit to the exam in order to continue with lessons? Or would they allow him to continue to sit on on mainsteam just for the fun of learning? I'm not sure if he'll be ready for the pressure of exams on the standard schedule.
I don't know the level of TA education. I can Google some job ads and get an idea. It seems too personal a question to actually ask of someone!
Great point about communication. I will definitely want the emails of his mainstream teachers (if he chooses to do mainstream classes)
Social skills lessons are a plus! There was plenty of evidence of this when I visited.
I'm really glad things are working out for your son.
It's so difficult isn't it?
I feel like I have to choose between nurture/pastoral care and academic rigour.
There's a big part of me that would like to keep home educating forever because he is so happy and settled.
But the teenage years are almost upon us and he needs some experience out in the wider world.