All the other children at my school are stupid. Except I'm not meant to call...

All the other children at my school are stupid. Except I'm not meant to call them stupid, even though this is what they are. I'm meant to say that they have learning difficulties or that they have special needs. But this is stupid because everyone has learning difficulties because learning to speak French or understanding relativity is difficult and also everyone has special needs, like Father, who has to carry a little packet of artificial sweetening tablets around with him to put in his coffee to stop him from getting fat, or Mrs. Peters, who wears a beige-colored hearing aid, or Siobhan, who has glasses so thick that they give you a headache if you borrow them, and none of these people are Special Needs, even if they have special needs.
But Siobhan said we have to use those words because people used to call children like the children at school spaz and crip and mong, which were nasty words. But that is stupid too because sometimes the children from the school down the road see us in the street when we're getting off the bus and they shout, "Special Needs! Special Needs!" But I don't take any notice because I don't listen to what other people say and only sticks and stones can break my bones and I have a Swiss Army knife if they hit me and if I kill them it will be self-defense and I won't go to prison.