DD1 (15) went to mainstream preschool - absolute disaster. They didn't know what they were doing with her and lacked consistency. She ran rings around them despite full time 1:1.
She then went to special primary school. They had 10 to a class with 4 staff. Extra curricular stuff was done during the school week. After school club was provided, but it meant parents needed to collect the children.
She moved to special secondary school. 12-14 to a class with 3/4 staff. It hasn't gone well for DD1, mainly due to her SEMH needs. Having said that, they have completely pulled out the stops once they'd realised it was all going so wrong, and DD1 has bespoke provision to meet her needs now. She is included in class, but has various provisions to help her when she can't cope. Again, extra curricular is dealt with in the school week, so no need for after school clubs in general, although they do have sports after school, too.
DD1 is at about year 1 level ability for maths and English in year 11. She can't read fluently.
Some children do Gateway awards and others go GCSEs, although lower grades.
Special schools tend to be set up for independence. For example, DD1's schools have been secure sites, with CCTV. This means that children can move about the school independently, because they can't get out and they can be located, so they are safe.
DD1 is going to a mainstream college, but they have a 'School of Personalised Learning' on site. They provide a bespoke curriculum for their learners with SEN. The courses they offer depend on the needs of their students.
DD1 is likely to do entry level 1/2 life skills courses initially, then she'll progress. She can potentially stay at college until she's 25, although most young people go to community projects once they're 19.