All the kids in this classroom but one have a full time nurse. There's several types of tracks for disabled classrooms. Life skills track is where you'll find the autistic and downs kids usually. The room I'm in is called multiple disabilities track and the kids range in problems but they are all severe. Very low functioning. In our area about 15 elementary schools across 3 districts contribute population to one classroom, so you may be one of the schools that doesn't ever see these kids.  Edit: because I realized I never answered your question...most of the kids have birth defects that result in brain damage and seizures.