While giving teachers more education on special needs is always nice to have, it’s not going to solve the need for additional staff. Pretty much all teachers already receive some baseline instructions and training related to handling students with disabilities. There are already classrooms with additional needs kids that only have a single member of staff. For more mild disabilities that’s the standard here in the UK. There are also loads of students like me who going through school needed dedicated staff even if it was in a normal mainstream classroom environment. There are sort of three levels of intervention here: exam arrangements only, additional support in class, and dedicated classrooms. All three are used for good reasons. In some cases you can have different levels of intervention for the same student in different classes depending on how much they struggle in a given academic area, that’s what I had towards the end of my schooling career.