Well, in response to one of the Moms, believe it or not, they do "expel" the child. My Daughter has been kicked out of two schools now. She will be five this week. It's very hard to deal with, not to sound discouraging.
There are programs you can contact that will help you place your child in an environment that is better for him. I can give you a number if you like or the web addres. Actually, the number I have is probably for someone close to my house. Here's the web address - www.elcmdm.org. It's a county program. Anyway, they match you up with someone that can take you to different schools to check out. It kinda makes the "interview" process a bit easier, ya know since you're not going at it alone. Ask all the questions you want! They're really nice. Hope this helps!