So which is it - racist or ablist? Can anyone confirm that the term “runner” refers to a Special Ed student? To me it seems more likely it refers to students from low-discipline families who try to escape from school, hence “runner” and not “wanderer” or something similar.
That the teacher is evidently trying to use the “I was hacked” excuse tells you about his character and he probably shouldn’t be teaching anyway.
In my day they were called speds or spazzes. There were other names, but I’m only mentioning the harmless ones.
CC