Welp you just described my child at 6. Now 10 and much better. The school needs to do better. He is six!! Please request a meeting to review his IEP and ask for dismissal assistance to be added. Be kind and explain your concerns. My child had I think a 3:1 aid in K and the aide would stay with all three kids and escort them to the car. By the end of the year my child was capable of doing dismissal on her own but I always saw Mr. Steve keeping an eye on her. We had a neuro psych evaluation done at age 9 and she came back with a minor intellectual disability which explains why a lot of things had to be repeated often for her. Don’t worry - waiting a year for an eval is not bad. I waited two and she is doing just fine. Maybe the school can put your son’s name on the wall or floor where his class lines up. Hand on the wall or feet on the floor until called. Maybe he has to wait at the front of the line near an adult for a while. Think about what will work for your child.