Cerebral palsy is not mental retardation. There is usually a normal mind locked in that broken body. The kids can learn just fine when not being tormented by kids with broken minds and normal bodies.
The problem is that normal kids can be pretty cruel. Pretending that this isn't so is absurd.
And what was a kid with a "broken body" doing on a regular school bus anyway. How much time did normal kids waste putting up with whatever had to be done to accommodate this kid? Or don't normal kids count?
When my own kids were growing up, I attended one of those Christmas (now "holiday") concerts. The great liberals had to feature some crippled (can I say that here?) kid in a wheel-chair as a soloist. She came out first in front of the curtain in her wheel-chair. Then the curtain when up to reveal the rest of the chorus (or orchestra, I forget which). As it did it snagged on the girl's wheel-chair and lifted one side of the chair skyward while the girl screamed. I don't remember whether she was dumped on the floor, or not; but it was a perfect moment which demonstrated that political correctness can have unintended consequences.
ML/NJ