Both of my children attended preschool and primary school in classes like you describe. The difference is in the numbers. The ratio was one special needs child to every five typical children. At the preschool level the cap was 15 students. At the primary level the cap was 20. During first grade there was a boy with autism in my daughter's class. He had a bit of a temper and would throw fits. If he threw a fit he was immediately removed from the room. This boy loved Elmo. I remember my daughter talking about how proud she was of him when he earned a lot of Elmo's during the day. Evidently, he could earn Elmo magnets to use later for a small reward. It just sounded funny when she talked about this boy and his Elmo's! Both of my children learned that learning and life are not easy for everyone. They know everyone is different and that some things are easier for some people while others really struggle.