My DS is at a private school. He has learning difficulties and is actually assessed cognitively as borderline of maybe needing to be in a special school. Problem is there are none that meet his needs where we are, so he would have to be residential.
Smaller classes. 12 in each class.
Exceptional pastoral care- he usually has to leave class about 4 times a week for some self imposed time out. He pops into the head of year's office and is given a sugary tea and usually a scone or piece of cake. They call me and I have a chat with him and he goes back to class.
Committed, interested teachers. I have no doubt this is not unique to private schools but it is something we value very much.
Reasonable adjustments galore. Plus plenty of good nature about it- he is not a burden.
Longer days - 8.15 to 4.20. Wrap around care with before school clubs and after school clubs for those who need them and can cope.
Fabulous communication with parents- and their lockdown home schooling programme was exceptional. Zoom live classes- including PE.
Terrific extra curricular- although mine cannot access it due to his needs. But for those who can- sailing, horse riding, fencing, lacrosse, community based projects, skiing.
I dislike it when people just put a blanket dismissal on private school parents as being motivated by social connections or buying places into uni. We made choices based on things that have nothing at all to do with university (he is unlikely to go).
We have been so lucky with our school. Abd lucky that we can afford it. I never take any of that for granted.