You will want to talk with the Grant Wood Area Education Agency.
Welcome to Grant Wood Area Education Agency
I would check out the programs & services link as well as the parents & students link.
I know a four year old with an IEP who is receiving good support. I don't know as much for 11 y.o. age group.
The public schools in Iowa City are excellent for most children. Maybe it is due to the education or due to the high number of highly educated parents in the city (per capita graduate degrees second only to Rochester, MN). My uneducated guess is there may be slightly fewer services due to the smaller size of the city, but I don't have a good basis for that opinion.
Best of luck.