It's more common for kids with IEP's to be in a mainstream classroom then it is for them to be in a contained Special Ed classroom. Kids are to be educated in the least restrictive environment, it's the law and it's something parents fight for. When it comes to the general population and IEPs in general, it's rare to have a student that would benefit more from a self contained classroom as opposed to an inclusive classroom. Also since IEPs cover a wide range of disabilities there are far more children that just need some in class support or need to be pulled for resource room for reading and math then there are kids that would require the intensive and contained education found in a special needs classroom.
A teacher with any kind of experience at all has no reason to not have had a great deal of experience with IEPs etc. Having proved my point several times over now, I am now going to try to respect WMJ's request and will try very hard to not comment on this particular piece of fiction any longer.